Todd E Katzner
My research interests focus on wildlife conservation ecology and the interaction between wildlife and the role of wildlife in natural systems.
Much of my work is built around utilization of novel technologies and approaches to wildlife ecology. I was part of a team that developed the first non-invasive monitoring scheme for any avian species, I was involved in development of novel high-frequency GPS-GSM telemetry systems for tracking migratory birds, and I developed a network of camera traps to monitor abundance and distribution of terrestrial avian scavengers across eastern North America. Much of my recent funding is focused on evaluating the potential impacts of renewable energy development on conservation-dependent birds.
Professional Experience
2014 - Present: USGS, Forest and Rangeland Ecosystem Science Center, Supervisory Research Wildlife Biologist, Boise, Idaho
Education and Certifications
Ph.D., Arizona State University, Tempe, AZ (2003)
M.S., University of Wyoming, Laramie, WY (1994)
B.A., Oberlin College, Oberlin, OH (1991)
Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 152
Open-source intelligence for conservation biology
Open-source intelligence (OSINT) evolved in spy agencies but now is rapidly changing many fields of study, from anthropology to zoology. Despite the fact that OSINT occasionally is used in conservation biology, there is little recognition that some tools and frameworks used by conservation professionals are drawn from this well-established field. The history and conceptual foundations of...
Authors
Todd Eli Katzner, Eve C. Thomason, Karrin Huhmann, Tara Conkling, Camille B. Concepcion, Vincent S. Slabe, Sharon Poessel
Interannual consistency of migration phenology is season- and breeding region-specific in North American Golden Eagles
Interannual consistency (an indicator of the strength of adjustments) in migration phenology of Golden Eagles (Aquila chrysaetos) in North America is most strongly associated with the breeding region, the season, and with late-season temperature on breeding and wintering grounds. Consistency was greatest in boreal spring migration and the breeding regions of eastern Canada. Using multi...
Authors
Laurie D Maynard, Jean-Francois Therrien, Jerome Lemaître, Travis L. Booms, Tricia Miller, Todd Eli Katzner, Scott G. Somershoe, Jeff Cooper, Robert Sargent, Nicolas Lecomte
Migration of first-year steppe eagles (Aquila nipalensis) from northern Kazakhstan and implications for conservation
Extensive anthropogenic alteration of steppe ecosystems throughout Eurasia leaves central Asia with some of the world’s last remaining large expanses of grassland habitat. Steppe eagles (Aquila nipalensis) are globally endangered breed primarily in these steppe ecosystems. We evaluated migratory movements of first year steppe eagles hatched in northern Kazakhstan, to understand their...
Authors
Todd Eli Katzner, Ron Efrat, A. E. Bragin, Yael Lehnardt, E. A. Bragin, N. Sapir
Managing macropods without poisoning ecosystems
A recent review of the management of hyperabundant macropods in Australia proposed that expanded professional shooting is likely to lead to better biodiversity and animal welfare outcomes. While the tenets of this general argument are sound, it overlooks one important issue for biodiversity and animal health and welfare: reliance on toxic lead-based ammunition. Lead poisoning poses a...
Authors
Jordan O Hampton, James M. Pay, Todd Eli Katzner, Jon M Arnemo, Mark A Pokras, Eric Buenz, Niels Kanstrup, Vernon G Thomas, Marcela Uhart, Sergio A Lambertucci, Oliver Krone, Navinder J. Singh, Vinny Naidoo, Mayumi Ishizuka, Keisuke Saito, Björn Helander, Rhys E. Green
Interpreting long-distance movements of non-migratory golden eagles: Prospecting and nomadism?
Movements by animals can serve different functions and occur over a variety of spatial and temporal scales. Routine movement types, such as residency (localized movements) and migration, have been well studied. However, nonroutine movement types, such as dispersal, prospecting, and nomadism, are less well understood. Documenting these rarely detected events requires tracking large...
Authors
Sharon Poessel, Brian Woodbridge, Brian Smith, Robert W. Murphy, Bryan E. Bedrosian, Douglas A. Bell, David Bittner, Peter H. Bloom, Ross H. Crandall, Robert Domenech, Robert N. Fisher, Patricia Haggerty, Steven J. Slater, Jeff A. Tracey, James W. Watson, Todd Eli Katzner
Flight characteristics forecast entry by eagles into rotor-swept zones of wind turbines
Operators of wind power facilities can mitigate wildlife mortality by slowing or stopping wind turbines (hereafter ‘curtail’) when birds are at an increased risk of collision. Some facility operators curtail when individual birds have flight characteristics (e.g. altitude, distance or relative bearing of a bird's flight path) that exceed some threshold value, but thresholds currently in...
Authors
Brian W. Rolek, Melissa Braham, Tricia Miller, Adam E. Duerr, Todd Eli Katzner, Jennifer D. McCabe, Leah Dunn, Christopher J.W. McClure
Counterfactuals to assess effects to species and systems from renewable energy development
Renewable energy production, mostly via wind, solar, and biofuels, is central to goals worldwide to reduce carbon emissions and mitigate anthropogenic climate change (IPCC, 2014; Pörtner et al., 2021). Nevertheless, adverse impacts to natural systems, especially fatalities of wildlife and alteration of habitat, are key challenges for renewable energy production (Allison et al., 2019...
Authors
Todd Eli Katzner, Taber Allison, James Diffendorfer, Amanda Hale, Eric J. Lantz, Paul Veers
A flexible movement model for partially migrating species
We propose a flexible model for a partially migrating species, which we demonstrate using yearly paths for golden eagles (Aquila chrysaetos). Our model relies on a smoothly time-varying potential surface defined by a number of attractors. We compare our proposed approach using varying coefficients to a latent-state model, which we define differently for migrating, dispersing, and local...
Authors
Elizabeth Eisenhauer, Ephraim M. Hanks, Matthew Beckman, Robert W. Murphy, Tricia Miller, Todd Eli Katzner
Vulnerability of avian populations to renewable energy production
Renewable energy production can kill individual birds, but little is known about how it affects avian populations. We assessed the vulnerability of populations for 23 priority bird species killed at wind and solar facilities in California, USA. Bayesian hierarchical models suggested that 48% of these species were vulnerable to population-level effects from added fatalities caused by...
Authors
Tara Conkling, Hannah B. Vander Zanden, Taber Allison, James Diffendorfer, Thomas V Dietsch, A. Duerr, Amy L. Fesnock, Rebecca R. Hernandez, S. R. Loss, David Mcgovern Nelson, Peter M. Sanzenbacher, Julie L. Yee, Todd Eli Katzner
Greater sage-grouse respond positively to intensive post-fire restoration treatments
Habitat loss is the most prevalent threat to biodiversity in North America. One of the most threatened landscapes in the United States is the sagebrush (Artemisia spp.) ecosystem, much of which has been fragmented or converted to non-native grasslands via the cheatgrass-fire cycle. Like many sagebrush obligates, greater sage-grouse (Centrocercus urophasianus) depend upon sagebrush for...
Authors
Sharon Poessel, David Barnard, Cara Applestein, Matthew Germino, Ethan A. Ellsworth, Donald J. Major, Ann M. Moser, Todd Eli Katzner
Stochastic agent-based model for predicting turbine-scale raptor movements during updraft-subsidized directional flights
Rapid expansion of wind energy development across the world has highlighted the need to better understand turbine-caused avian mortality. The risk to golden eagles (Aquila chrysaetos) is of particular concern due to their small population size and conservation status. Golden eagles subsidize their flight in part by soaring in orographic updrafts, which can place them in conflict with...
Authors
Rimple Sandhu, Charles Tripp, Eliot Quon, Regis Thedin, Michael Lawson, David Brandes, Chris Farmer, Tricia Miller, Caroline Draxl, Paula Doubrawa, Lindy Williams, Adam E. Duerr, Melissa Braham, Todd Eli Katzner
Nocturnal light-specific temporal partitioning facilitates coexistence for a small mesopredator, the eastern spotted skunk
Eastern spotted skunks are of conservation concern where competition and predation are a possible cause of their decline. Using camera traps at a food subsidy, we investigated nocturnal temporal overlap of spotted skunks with co-occurring predators. Spotted skunks were more active during dark nights, when their activity overlapped with the largest predator (coyotes), but not with other...
Authors
Courtney J. Marneweck, Cameron R. Forehand, Charles D. Waggy, Stephen N. Harris, Todd Eli Katzner, David S. Jachowski
Non-USGS Publications**
Katzner, T.E., Miller, T.A., Rodrigue, J.L., Shaffer, S., 2015, A Most Dangerous Game- Death and Injury to Birds from Porcupine Quills: Wilson Journal of Ornithology, v. 127, no. 1, p. 102-108, https://doi.org/10.1676/14-066.1.
Behmke, S., Fallon, J.A., Duerr, A., Lehner, A., Buchweitz, J., Katzner, T.E., 2015, Chronic lead exposure is epidemic in obligate scavenger populations in eastern North America: Environment International, v. 79, p. 51-55, https://doi.org/10.1016/j.envint.2015.03.010.
Duerr, A.E., Miller, T.A., Lanzone, M.J., Brandes, D., Cooper, J., O'Malley, K., Maisonnueve, C., Tremblay, J., Katzner, T.E., 2015, Flight response of slope-soaring birds to seasonal variation in thermal generation: Functional Ecology, v. 29, no. 6, p. 779-790, https://doi.org/10.1111/1365-2435.12381.
Dennhardt, A.J., Duerr, A.E., Brandes, D., Katzner, T.E., 2015, Integrating citizen-science data with movement models to estimate the size of a migratory golden eagle population: Biological Conservation, v. 184, p. 68-78, https://doi.org/10.1016/j.biocon.2015.01.003.
Morneau, F., Tremblay, J., Todd, C., Chubbs, T.E., Maisonnueve, C., Lemaıˆtre, J., Katzner, T.E., 2015, Known Breeding Distribution and Abundance of Golden Eagles in Eastern North America: Northeastern Naturalist, v. 22, no. 2, p. 236-247, https://doi.org/10.1656/045.022.0201.
Miller, T.A., Brooks, R.P., Lanzone, M.J., Brandes, D., Cooper, J., Tremblay, J., Wilhelm, J., Duerr, A.E., Katzner, T.E., 2015, Limitations and mechanisms influencing the migratory performance of soaring birds: Ibis, v. 158, no. 1, p. 116-134, https://doi.org/10.1111/ibi.12331.
Dennhardt, A.J., Duerr, A.E., Brandes, D., Katzner, T.E., 2015, Modeling autumn migration of a rare soaring raptor identifies new movement corridors in central Appalachia: Ecological Modelling, v. 303, p. 19-29, https://doi.org/10.1016/j.ecolmodel.2015.02.010.
Katzner, T.E., Turk, P., Duerr, A.E., Miller, T.A., Lanzone, M.J., Cooper, J., Brandes, D., Tremblay, J., Lemaıˆtre, J., 2015, Use of multiple modes of flight subsidy by a soaring terrestrial bird, the golden eagle Aquila chrysaetos, when on migration: Journal of the Royal Society Interface, v. 12, no. 112, p. 20150530, https://doi.org/10.1098/rsif.2015.0530.
Pettorelli, N., Evans, D.M., Garner, T.W., Katzner, T.E., Gompper, M.E., Altwegg, R., Branch, T.A., Johnson, J.A., Pollock, K., DaVolls, L., Rantanen, E., Gordon, I.J., 2013, Addressing gender imbalances in Animal Conservation: Animal Conservation, v. 16, p. 131-133, https://doi.org/10.1111/acv.12032.
Katzner, T.E., Collar, N.J., 2013, Are insular populations of the Philippine falconet (Microhierax erythrogenys) steps in a cline?: The Condor, v. 115, no. 3, p. 576-583, https://doi.org/10.1525/cond.2013.120070.
Latta, S.C., Musher, L.J., Latta, K.N., Katzner, T.E., 2013, Influence of human population size and the built environment on avian assemblages in urban green spaces: Urban Ecosystems, v. 16, no. 3, p. 463-479, https://doi.org/10.1007/s11252-012-0282-z.
Sklyarenko, S.L., Katzner, T.E., 2012, The Status of Populations of Vultures in Kazakhstan In Kovshar, A.F., Rustamov, E.A., Mitropolsky, O.V., Levin, A.S., Kovshar, V.A., eds., Ornithological News of Kazakhstan and Middle Asia: ISBN 978-601-7287-05-4, Almaty, Kazakhstan, Menzbier’s Ornithological Society, p. 178-185.
Katzner, T.E., Winton, J.D., McMorris, F.A., Brauning, D., 2012, Dispersal, Band Encounters, and Causes of Death in a Reintroduced and Rapidly Growing Population of Peregrine Falcons: Journal of Raptor Research, v. 46, no. 1, p. 75-83, https://doi.org/10.3356/JRR-10-93.1.
Al Hasani, I.K., Azar, J.F., Nishimura, K., Amr, Z.S., Katzner, T.E., 2012, Distribution, diet and winter ecology of the Imperial Eagle Aquila heliaca in Jordan.: Vertebrate Zoology, v. 62, no. 2, p. 273-280.
Borher, G., Brandes, D., Mandel, J., Bildstein, K.L., Miller, T., Lanzone, M., Katzner, T.E., Maissoneuve, C., Tremblay, J., 2012, Estimating updraft velocity components over large spatial scales- Contrasting migration strategies of golden eagles and turkey vultures: Ecology Letters, v. 15, no. 2, p. 96-103, https://doi.org/10.1111/j.1461-0248.2011.01713.x.
Branch, T.A., Austin, J.D., Pollock, K., Gordon, I.J., Gompper, M.E., Katzner, T.E., Pettorelli, N., 2012, Fisheries conservation and management- finding consensus in the midst of competing paradigms: Animal Conservation, v. 15, no. 1, p. 1-3, https://doi.org/10.1111/j.1469-1795.2011.00502.x.
Lanzone, M., Miller, T., Turk, P., Brandes, D., Halverson, C., Maissoneuve, C., Tremblay, J., Cooper, J., O'Malley, K., Brooks, R., Katzner, T.E., 2012, Flight responses by a migratory soaring raptor to changing meteorological conditions: Biology Letters, v. 8, no. 5, p. 710-713, https://doi.org/10.1098/rsbl.2012.0359.
Evans, D.M., Barnard, P., Koh, L.P., Chapman, C.A., Altwegg, R., Garner, T.W., Gompper, M.E., Gordon, I.J., Katzner, T.E., Pettorelli, N., 2012, Funding nature conservation- who pays?: Animal Conservation, v. 15, no. 3, p. 215-216, https://doi.org/10.1111/j.1469-1795.2012.00550.x.
Bragin, E., Katzner, T.E., 2012, Second nest record of Smew Mergus albellus in the Naurzum forest: Russian Ornithological Society: Express Issue, v. 21, no. 743, p. 724-725.
Katzner, T.E., Smith, B.W., Miller, T.A., Brandes, D., Cooper, J., Lanzone, M., Brauning, D., Farmer, C., Harding, S., Kramer, D., Koppie, C., Maissoneuve, C., Martell, M., Mojica, E.K., Todd, C., Tremblay, J., Wheeler, M., Brinker, D.F., Chubbs, T.E., O'Malley, K., Mehus, S., Porter, B., Brooks, R.P., Watts, B.D., Bildstein, K.L., 2012, Status, biology and conservation priorities for North America’s eastern Golden Eagle (Aquila chrysaetos) population: Auk, v. 29, no. 1, p. 168-176, https://doi.org/10.1525/auk.2011.11078.
Bragin, E., Katzner, T.E., Bragin, E., 2012, Summer accumulation of large birds of prey , and the problem of estimating their number - Proceedings Menzbirovskogo Ornithological Society: Volume I: Proceedings of XIII International Ornithological Conference of Northern Eurasia, p. 234-240.
Duerr, A., Miller, T., Lanzone, M., Brandes, D., Cooper, J., O'Malley, K., Maissoneuve, C., Tremblay, J., Katzner, T.E., 2012, Testing an emerging paradigm in migration ecology shows surprising differences in efficiency between flight modes: PLOS ONE, v. 7, no. 4, p. e35548, https://doi.org/10.1371/journal.pone.0035548.
Katzner, T.E., Wheeler, M., Negro, J.J., Kapetanakos, Y., DeWoody, J.A., Horvath, M., Lovette, I., 2012, To pluck or not to pluck- scientific methodologies should be carefully chosen, not “one size fits all": Journal of Avian Biology, v. 43, p. 15-17, https://doi.org/10.1111/j.1600-048X.2011.05592.x.
Katzner, T.E., Brandes, D., Miller, T., Lanzone, M., Maissoneuve, C., Tremblay, J., Mulvihill, R., Merovich, G., 2012, Topography drives migratory flight altitude of golden eagles- implications for on-shore wind energy development: Journal of Applied Ecology, v. 49, no. 5, p. 1178-1186, https://doi.org/10.1111/j.1365-2664.2012.02185.x.
Gordon, I.J., Pollock, K., Altwegg, R., Garner, T.W., Gompper, M.E., Katzner, T.E., Pettorelli, N., Redpath, S., 2012, What the ‘food security’ agenda means for animal conservation in terrestrial ecosystems: Animal Conservation, v. 15, no. 2, p. 115-116, https://doi.org/10.1111/j.1469-1795.2012.00541.x.
Katzner, T.E., Ivy, J.R., Bragin, E., Milner-Gulland, E.J., DeWoody, J.A., 2011, Conservation implications of inaccurate estimation of cryptic population size: Animal Conservation, v. 14, no. 4, p. 328-332, https://doi.org/10.1111/j.1469-1795.2011.00444.x.
Iverson, S.A., Gavrilov, A., Katzner, T.E., Takekawa, J., Newman, S., Miller, T., Hagemeijer, W., Sivananinthaperumal, B., Mundkur, T., DeMattos, C., Ahmed, L.S., 2011, Migratory movements of waterfowl in Central Asia and avian influenza emergence- sporadic transmission of H5N1 from east to west: Ibis, v. 153, no. 2, p. 279-292, https://doi.org/10.1111/j.1474-919X.2010.01095.x.
Jones, J.P., Collen, B., Baxter, P.W., Bubb, P., Illian, J., Katzner, T.E., Keane, A., Loh, J., McDonald-Madden, E., Nicholson, E., Pereira, H., Possingham, H., Pullin, A., Rodrigues, A., Ruiz-Gutierrez, V., Sommerville, M., Milner-Gulland, E.J., 2011, The Why, What, and How of Global Biodiversity Indicators Beyond the 2010 Target: Conservation Biology, v. 25, no. 3, p. 450-457, https://doi.org/10.1111/j.1523-1739.2010.01605.x.
Terraube, J., Arroyo, B.E., Mougeot, F., Katzner, T.E., Bragin, E., 2010, Breeding biology of the Montagu’s harrier (Circus pygargus) in north-central Kazakhstan: Journal of Ornithology, v. 151, no. 3, p. 713-722, https://doi.org/10.1007/s10336-010-0505-0.
Rudnick, J.A., Katzner, T.E., DeWoody, J.A., 2009, Genetic Analyses of Noninvasively Collected Feathers Can Provide Insights into Avian Demography and Behavior In Aronoff, J.B., ed., Handbook of Nature Conservation: Hauppauge, NY, Nova Science Publishers, p. 181-197.
Miller, T.M., Brandes, D., Lanzone, M., Ombalski, D., Maisonnueve, C., Katzner, T.E., 2009, Golden eagle migration and winter behavior in Pennsylvania In Majumdar, S.K., ed., Avian Ecology and Conservation: A Pennsylvania Focus with National Implications: Immaculata, PA, Pennsylvania Academy of Sciences, p. 111-125.
Brandes, D., Miller, T.M., Katzner, T.E., 2009, Wind Power Mortality In Majumdar, S.K., ed., Avian Ecology and Conservation: A Pennsylvania Focus with National Implications: Immaculata, PA, Pennsylvania Academy of Sciences, p. 300-303.
Rudnick, J.A., Katzner, T.E., Bragin, E.A., DeWoody, J.A., 2008, A non-invasive genetic evaluation of population size, natal philopatry, and roosting behavior of non-breeding eastern imperial eagles (Aquila heliaca) in central Asia: Conservation Genetics, v. 9, p. 667-676.
Poulakakis, N., Antoniou, A., Mantziou, G., Parmakelis, A., Skartsi, T., Vasilakis, D., Elorriaga, J., De La Puente, J., Gavashelishvili, A., Ghasabyan, M., Katzner, T.E., McGrady, M.J., Batbayar, N., Fuller, M.R., Natsagdorj, T., 2008, Population structure, diversity, and phylogeography in the near-threatened Eurasian black vultures Aegypius monachus (Falconiformes; Accipitridae) in Europe- insights from microsatellite and mitochondrial DNA variation: Biological Journal of the Linnean Society, v. 95, p. 859-872.
Kenward, R., Katzner, T.E., Wink, M., Marcström, V., Walls, S., Karlbom, M., Pfeffer, R., Bragin, E.A., Hodder, K., Levin, A.S., 2007, Rapid sustainability modelling for raptors by radio tagging and DNA fingerprinting: Journal of Wildlife Management, v. 71, no. 1, p. 238-245.
Ryabtsev, V.V., Katzner, T.E., 2007, Severe declines of Eastern Imperial Eagle Aquila heliaca populations in the Baikal region, Russia- a modern and historical perspective: Bird Conservation International, v. 17, no. 03, p. 197-209.
Rudnick, J.A., Katzner, T.E., Bragin, E.A., DeWoody, J.A., 2007, Species identification of birds through genetic analysis of naturally shed feathers: Molecular Ecology Notes, p. 757-762.
Katzner, T.E., Milner-Gulland, E.J., Bragin, E.A., 2007, Using modeling to improve monitoring of structured populations- are we collecting the right data?: Conservation Biology, v. 21, no. 1, p. 241-252.
Katzner, T.E., Bragin, E.A., Milner-Gulland, E.J., 2006, Modelling populations of long lived birds of prey for conservation- a study of Imperial Eagles (Aquila heliaca) in Kazakhstan: Biological Conservation, v. 132, no. 3, p. 322-335.
Katzner, T.E., 2005, Corruption - a double-edged sword for conservation? A response to Smith and Walpole.: Oryx, v. 39, no. 3, p. 260-262.
Katzner, T.E., Robertson, S., Robertson, B., Klucsarits, J., McCarty, K.M., Bildstein, K.L., 2005, Results from a long-term nest-box program for American Kestrels- implications for improved population monitoring and conservation: Journal of Field Ornithology, v. 76, no. 3, p. 217-318.
Busch, J., Katzner, T.E., Bragin, E.A., Keim, P., 2005, Tetranucleotide microsatellites for aquila and haliaeetus eagles: Molecular Ecology Notes, v. 5, no. 1, p. 39-41.
Rudnick, J.A., Katzner, T.E., Bragin, E.A., Rhodes, O.E., DeWoody, J.A., 2005, Using naturally shed feathers for individual identification, genetic parentage analyses, and population monitoring in an endangered Eastern imperial eagle (Aquila heliaca) population from Kazakhstan: Molecular Ecology, v. 14, no. 10, p. 2959-2967.
Katzner, T.E., Hsun Lai, C., Gardiner, J.D., Foggin, J.M., Pearson, D., Smith, A.T., 2004, Adjacent nesting by Lammergeier Gypaetus barbatus and Himalayan Griffon Gyps himalayensis on the Tibetan Plateau, China: Forktail, v. 20, p. 94-96.
Leppert, L.L., Layman, S., Bragin, E.A., Katzner, T.E., 2004, Survey for Hemoparasites in Imperial Eagles (Aquila heliaca), Steppe Eagles (Aquila nipalensis), and White-tailed Sea Eagles (Haliaeetus albicilla) from Kazakhstan: Journal of Wildlife Diseases, v. 40, no. 2, p. 316-319.
Sharik, T.L., Katzner, T.E., Bragina, T.M., 2003, A new species of Copidosoma Ratzeburg (Hymenoptera- Encyrtidae) from eagle nests in Kazakhstan: Journal of Hymenoptera Research, v. 12, no. 2, p. 308-311.
Pain, D.J., Cunningham, P.G., Donald, P.F., Duckworth, J.W., Houston, D.C., Katzner, T.E., Parry-Jones, J., Poole, C., Prakash, V., Round, P., Timmins, R., 2003, Causes and impacts of temporospatial declines of Gypsvultures in Asia: Conservation Biology, v. 17, no. 3, p. 661-671.
Katzner, T.E., Parker, K.L., 1998, Long distance movements from established burrow sites by pygmy rabbits (Brachylagus idahoensis) in southwestern Wyoming: Northwest Naturalist, v. 79, no. 2, p. 72-74.
Katzner, T.E., Cruz, Y.P., 1998, Survival of the Polyembryonic Parasitoid Copidosomopsis tanytmema (Hymenoptera- Encyrtidae) in Envenomized Larvae of its Host Anagasta kuehniella (Lepidoptera- Pyralidae): Annals of the Entomological Society of America, v. 91, no. 6, p. 808-812.
Katzner, T.E., Parker, K.L., Hardegree, S.P., 1997, Metabolism and Thermal Response in Winter-Acclimatized Pygmy Rabbits (Brachylagus idahoensis): Journal of Mammalogy, v. 78, no. 4, p. 1053-1062.
Katzner, T.E., Parker, K.L., 1997, Vegetative Characteristics and Size of Home Ranges Used by Pygmy Rabbits (Brachylagus idahoensis) during Winter: Journal of Mammalogy, v. 78, no. 4, p. 1063-1072.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
To request an interview, contact fresc_outreach@usgs.gov or call (541) 750-1030.
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Science and Products
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
If you are unable to access or download a product, email fresc_outreach@usgs.gov a request, including the full citation, or call (541) 750-1030.
Filter Total Items: 152
Open-source intelligence for conservation biology
Open-source intelligence (OSINT) evolved in spy agencies but now is rapidly changing many fields of study, from anthropology to zoology. Despite the fact that OSINT occasionally is used in conservation biology, there is little recognition that some tools and frameworks used by conservation professionals are drawn from this well-established field. The history and conceptual foundations of...
Authors
Todd Eli Katzner, Eve C. Thomason, Karrin Huhmann, Tara Conkling, Camille B. Concepcion, Vincent S. Slabe, Sharon Poessel
Interannual consistency of migration phenology is season- and breeding region-specific in North American Golden Eagles
Interannual consistency (an indicator of the strength of adjustments) in migration phenology of Golden Eagles (Aquila chrysaetos) in North America is most strongly associated with the breeding region, the season, and with late-season temperature on breeding and wintering grounds. Consistency was greatest in boreal spring migration and the breeding regions of eastern Canada. Using multi...
Authors
Laurie D Maynard, Jean-Francois Therrien, Jerome Lemaître, Travis L. Booms, Tricia Miller, Todd Eli Katzner, Scott G. Somershoe, Jeff Cooper, Robert Sargent, Nicolas Lecomte
Migration of first-year steppe eagles (Aquila nipalensis) from northern Kazakhstan and implications for conservation
Extensive anthropogenic alteration of steppe ecosystems throughout Eurasia leaves central Asia with some of the world’s last remaining large expanses of grassland habitat. Steppe eagles (Aquila nipalensis) are globally endangered breed primarily in these steppe ecosystems. We evaluated migratory movements of first year steppe eagles hatched in northern Kazakhstan, to understand their...
Authors
Todd Eli Katzner, Ron Efrat, A. E. Bragin, Yael Lehnardt, E. A. Bragin, N. Sapir
Managing macropods without poisoning ecosystems
A recent review of the management of hyperabundant macropods in Australia proposed that expanded professional shooting is likely to lead to better biodiversity and animal welfare outcomes. While the tenets of this general argument are sound, it overlooks one important issue for biodiversity and animal health and welfare: reliance on toxic lead-based ammunition. Lead poisoning poses a...
Authors
Jordan O Hampton, James M. Pay, Todd Eli Katzner, Jon M Arnemo, Mark A Pokras, Eric Buenz, Niels Kanstrup, Vernon G Thomas, Marcela Uhart, Sergio A Lambertucci, Oliver Krone, Navinder J. Singh, Vinny Naidoo, Mayumi Ishizuka, Keisuke Saito, Björn Helander, Rhys E. Green
Interpreting long-distance movements of non-migratory golden eagles: Prospecting and nomadism?
Movements by animals can serve different functions and occur over a variety of spatial and temporal scales. Routine movement types, such as residency (localized movements) and migration, have been well studied. However, nonroutine movement types, such as dispersal, prospecting, and nomadism, are less well understood. Documenting these rarely detected events requires tracking large...
Authors
Sharon Poessel, Brian Woodbridge, Brian Smith, Robert W. Murphy, Bryan E. Bedrosian, Douglas A. Bell, David Bittner, Peter H. Bloom, Ross H. Crandall, Robert Domenech, Robert N. Fisher, Patricia Haggerty, Steven J. Slater, Jeff A. Tracey, James W. Watson, Todd Eli Katzner
Flight characteristics forecast entry by eagles into rotor-swept zones of wind turbines
Operators of wind power facilities can mitigate wildlife mortality by slowing or stopping wind turbines (hereafter ‘curtail’) when birds are at an increased risk of collision. Some facility operators curtail when individual birds have flight characteristics (e.g. altitude, distance or relative bearing of a bird's flight path) that exceed some threshold value, but thresholds currently in...
Authors
Brian W. Rolek, Melissa Braham, Tricia Miller, Adam E. Duerr, Todd Eli Katzner, Jennifer D. McCabe, Leah Dunn, Christopher J.W. McClure
Counterfactuals to assess effects to species and systems from renewable energy development
Renewable energy production, mostly via wind, solar, and biofuels, is central to goals worldwide to reduce carbon emissions and mitigate anthropogenic climate change (IPCC, 2014; Pörtner et al., 2021). Nevertheless, adverse impacts to natural systems, especially fatalities of wildlife and alteration of habitat, are key challenges for renewable energy production (Allison et al., 2019...
Authors
Todd Eli Katzner, Taber Allison, James Diffendorfer, Amanda Hale, Eric J. Lantz, Paul Veers
A flexible movement model for partially migrating species
We propose a flexible model for a partially migrating species, which we demonstrate using yearly paths for golden eagles (Aquila chrysaetos). Our model relies on a smoothly time-varying potential surface defined by a number of attractors. We compare our proposed approach using varying coefficients to a latent-state model, which we define differently for migrating, dispersing, and local...
Authors
Elizabeth Eisenhauer, Ephraim M. Hanks, Matthew Beckman, Robert W. Murphy, Tricia Miller, Todd Eli Katzner
Vulnerability of avian populations to renewable energy production
Renewable energy production can kill individual birds, but little is known about how it affects avian populations. We assessed the vulnerability of populations for 23 priority bird species killed at wind and solar facilities in California, USA. Bayesian hierarchical models suggested that 48% of these species were vulnerable to population-level effects from added fatalities caused by...
Authors
Tara Conkling, Hannah B. Vander Zanden, Taber Allison, James Diffendorfer, Thomas V Dietsch, A. Duerr, Amy L. Fesnock, Rebecca R. Hernandez, S. R. Loss, David Mcgovern Nelson, Peter M. Sanzenbacher, Julie L. Yee, Todd Eli Katzner
Greater sage-grouse respond positively to intensive post-fire restoration treatments
Habitat loss is the most prevalent threat to biodiversity in North America. One of the most threatened landscapes in the United States is the sagebrush (Artemisia spp.) ecosystem, much of which has been fragmented or converted to non-native grasslands via the cheatgrass-fire cycle. Like many sagebrush obligates, greater sage-grouse (Centrocercus urophasianus) depend upon sagebrush for...
Authors
Sharon Poessel, David Barnard, Cara Applestein, Matthew Germino, Ethan A. Ellsworth, Donald J. Major, Ann M. Moser, Todd Eli Katzner
Stochastic agent-based model for predicting turbine-scale raptor movements during updraft-subsidized directional flights
Rapid expansion of wind energy development across the world has highlighted the need to better understand turbine-caused avian mortality. The risk to golden eagles (Aquila chrysaetos) is of particular concern due to their small population size and conservation status. Golden eagles subsidize their flight in part by soaring in orographic updrafts, which can place them in conflict with...
Authors
Rimple Sandhu, Charles Tripp, Eliot Quon, Regis Thedin, Michael Lawson, David Brandes, Chris Farmer, Tricia Miller, Caroline Draxl, Paula Doubrawa, Lindy Williams, Adam E. Duerr, Melissa Braham, Todd Eli Katzner
Nocturnal light-specific temporal partitioning facilitates coexistence for a small mesopredator, the eastern spotted skunk
Eastern spotted skunks are of conservation concern where competition and predation are a possible cause of their decline. Using camera traps at a food subsidy, we investigated nocturnal temporal overlap of spotted skunks with co-occurring predators. Spotted skunks were more active during dark nights, when their activity overlapped with the largest predator (coyotes), but not with other...
Authors
Courtney J. Marneweck, Cameron R. Forehand, Charles D. Waggy, Stephen N. Harris, Todd Eli Katzner, David S. Jachowski
Non-USGS Publications**
Katzner, T.E., Miller, T.A., Rodrigue, J.L., Shaffer, S., 2015, A Most Dangerous Game- Death and Injury to Birds from Porcupine Quills: Wilson Journal of Ornithology, v. 127, no. 1, p. 102-108, https://doi.org/10.1676/14-066.1.
Behmke, S., Fallon, J.A., Duerr, A., Lehner, A., Buchweitz, J., Katzner, T.E., 2015, Chronic lead exposure is epidemic in obligate scavenger populations in eastern North America: Environment International, v. 79, p. 51-55, https://doi.org/10.1016/j.envint.2015.03.010.
Duerr, A.E., Miller, T.A., Lanzone, M.J., Brandes, D., Cooper, J., O'Malley, K., Maisonnueve, C., Tremblay, J., Katzner, T.E., 2015, Flight response of slope-soaring birds to seasonal variation in thermal generation: Functional Ecology, v. 29, no. 6, p. 779-790, https://doi.org/10.1111/1365-2435.12381.
Dennhardt, A.J., Duerr, A.E., Brandes, D., Katzner, T.E., 2015, Integrating citizen-science data with movement models to estimate the size of a migratory golden eagle population: Biological Conservation, v. 184, p. 68-78, https://doi.org/10.1016/j.biocon.2015.01.003.
Morneau, F., Tremblay, J., Todd, C., Chubbs, T.E., Maisonnueve, C., Lemaıˆtre, J., Katzner, T.E., 2015, Known Breeding Distribution and Abundance of Golden Eagles in Eastern North America: Northeastern Naturalist, v. 22, no. 2, p. 236-247, https://doi.org/10.1656/045.022.0201.
Miller, T.A., Brooks, R.P., Lanzone, M.J., Brandes, D., Cooper, J., Tremblay, J., Wilhelm, J., Duerr, A.E., Katzner, T.E., 2015, Limitations and mechanisms influencing the migratory performance of soaring birds: Ibis, v. 158, no. 1, p. 116-134, https://doi.org/10.1111/ibi.12331.
Dennhardt, A.J., Duerr, A.E., Brandes, D., Katzner, T.E., 2015, Modeling autumn migration of a rare soaring raptor identifies new movement corridors in central Appalachia: Ecological Modelling, v. 303, p. 19-29, https://doi.org/10.1016/j.ecolmodel.2015.02.010.
Katzner, T.E., Turk, P., Duerr, A.E., Miller, T.A., Lanzone, M.J., Cooper, J., Brandes, D., Tremblay, J., Lemaıˆtre, J., 2015, Use of multiple modes of flight subsidy by a soaring terrestrial bird, the golden eagle Aquila chrysaetos, when on migration: Journal of the Royal Society Interface, v. 12, no. 112, p. 20150530, https://doi.org/10.1098/rsif.2015.0530.
Pettorelli, N., Evans, D.M., Garner, T.W., Katzner, T.E., Gompper, M.E., Altwegg, R., Branch, T.A., Johnson, J.A., Pollock, K., DaVolls, L., Rantanen, E., Gordon, I.J., 2013, Addressing gender imbalances in Animal Conservation: Animal Conservation, v. 16, p. 131-133, https://doi.org/10.1111/acv.12032.
Katzner, T.E., Collar, N.J., 2013, Are insular populations of the Philippine falconet (Microhierax erythrogenys) steps in a cline?: The Condor, v. 115, no. 3, p. 576-583, https://doi.org/10.1525/cond.2013.120070.
Latta, S.C., Musher, L.J., Latta, K.N., Katzner, T.E., 2013, Influence of human population size and the built environment on avian assemblages in urban green spaces: Urban Ecosystems, v. 16, no. 3, p. 463-479, https://doi.org/10.1007/s11252-012-0282-z.
Sklyarenko, S.L., Katzner, T.E., 2012, The Status of Populations of Vultures in Kazakhstan In Kovshar, A.F., Rustamov, E.A., Mitropolsky, O.V., Levin, A.S., Kovshar, V.A., eds., Ornithological News of Kazakhstan and Middle Asia: ISBN 978-601-7287-05-4, Almaty, Kazakhstan, Menzbier’s Ornithological Society, p. 178-185.
Katzner, T.E., Winton, J.D., McMorris, F.A., Brauning, D., 2012, Dispersal, Band Encounters, and Causes of Death in a Reintroduced and Rapidly Growing Population of Peregrine Falcons: Journal of Raptor Research, v. 46, no. 1, p. 75-83, https://doi.org/10.3356/JRR-10-93.1.
Al Hasani, I.K., Azar, J.F., Nishimura, K., Amr, Z.S., Katzner, T.E., 2012, Distribution, diet and winter ecology of the Imperial Eagle Aquila heliaca in Jordan.: Vertebrate Zoology, v. 62, no. 2, p. 273-280.
Borher, G., Brandes, D., Mandel, J., Bildstein, K.L., Miller, T., Lanzone, M., Katzner, T.E., Maissoneuve, C., Tremblay, J., 2012, Estimating updraft velocity components over large spatial scales- Contrasting migration strategies of golden eagles and turkey vultures: Ecology Letters, v. 15, no. 2, p. 96-103, https://doi.org/10.1111/j.1461-0248.2011.01713.x.
Branch, T.A., Austin, J.D., Pollock, K., Gordon, I.J., Gompper, M.E., Katzner, T.E., Pettorelli, N., 2012, Fisheries conservation and management- finding consensus in the midst of competing paradigms: Animal Conservation, v. 15, no. 1, p. 1-3, https://doi.org/10.1111/j.1469-1795.2011.00502.x.
Lanzone, M., Miller, T., Turk, P., Brandes, D., Halverson, C., Maissoneuve, C., Tremblay, J., Cooper, J., O'Malley, K., Brooks, R., Katzner, T.E., 2012, Flight responses by a migratory soaring raptor to changing meteorological conditions: Biology Letters, v. 8, no. 5, p. 710-713, https://doi.org/10.1098/rsbl.2012.0359.
Evans, D.M., Barnard, P., Koh, L.P., Chapman, C.A., Altwegg, R., Garner, T.W., Gompper, M.E., Gordon, I.J., Katzner, T.E., Pettorelli, N., 2012, Funding nature conservation- who pays?: Animal Conservation, v. 15, no. 3, p. 215-216, https://doi.org/10.1111/j.1469-1795.2012.00550.x.
Bragin, E., Katzner, T.E., 2012, Second nest record of Smew Mergus albellus in the Naurzum forest: Russian Ornithological Society: Express Issue, v. 21, no. 743, p. 724-725.
Katzner, T.E., Smith, B.W., Miller, T.A., Brandes, D., Cooper, J., Lanzone, M., Brauning, D., Farmer, C., Harding, S., Kramer, D., Koppie, C., Maissoneuve, C., Martell, M., Mojica, E.K., Todd, C., Tremblay, J., Wheeler, M., Brinker, D.F., Chubbs, T.E., O'Malley, K., Mehus, S., Porter, B., Brooks, R.P., Watts, B.D., Bildstein, K.L., 2012, Status, biology and conservation priorities for North America’s eastern Golden Eagle (Aquila chrysaetos) population: Auk, v. 29, no. 1, p. 168-176, https://doi.org/10.1525/auk.2011.11078.
Bragin, E., Katzner, T.E., Bragin, E., 2012, Summer accumulation of large birds of prey , and the problem of estimating their number - Proceedings Menzbirovskogo Ornithological Society: Volume I: Proceedings of XIII International Ornithological Conference of Northern Eurasia, p. 234-240.
Duerr, A., Miller, T., Lanzone, M., Brandes, D., Cooper, J., O'Malley, K., Maissoneuve, C., Tremblay, J., Katzner, T.E., 2012, Testing an emerging paradigm in migration ecology shows surprising differences in efficiency between flight modes: PLOS ONE, v. 7, no. 4, p. e35548, https://doi.org/10.1371/journal.pone.0035548.
Katzner, T.E., Wheeler, M., Negro, J.J., Kapetanakos, Y., DeWoody, J.A., Horvath, M., Lovette, I., 2012, To pluck or not to pluck- scientific methodologies should be carefully chosen, not “one size fits all": Journal of Avian Biology, v. 43, p. 15-17, https://doi.org/10.1111/j.1600-048X.2011.05592.x.
Katzner, T.E., Brandes, D., Miller, T., Lanzone, M., Maissoneuve, C., Tremblay, J., Mulvihill, R., Merovich, G., 2012, Topography drives migratory flight altitude of golden eagles- implications for on-shore wind energy development: Journal of Applied Ecology, v. 49, no. 5, p. 1178-1186, https://doi.org/10.1111/j.1365-2664.2012.02185.x.
Gordon, I.J., Pollock, K., Altwegg, R., Garner, T.W., Gompper, M.E., Katzner, T.E., Pettorelli, N., Redpath, S., 2012, What the ‘food security’ agenda means for animal conservation in terrestrial ecosystems: Animal Conservation, v. 15, no. 2, p. 115-116, https://doi.org/10.1111/j.1469-1795.2012.00541.x.
Katzner, T.E., Ivy, J.R., Bragin, E., Milner-Gulland, E.J., DeWoody, J.A., 2011, Conservation implications of inaccurate estimation of cryptic population size: Animal Conservation, v. 14, no. 4, p. 328-332, https://doi.org/10.1111/j.1469-1795.2011.00444.x.
Iverson, S.A., Gavrilov, A., Katzner, T.E., Takekawa, J., Newman, S., Miller, T., Hagemeijer, W., Sivananinthaperumal, B., Mundkur, T., DeMattos, C., Ahmed, L.S., 2011, Migratory movements of waterfowl in Central Asia and avian influenza emergence- sporadic transmission of H5N1 from east to west: Ibis, v. 153, no. 2, p. 279-292, https://doi.org/10.1111/j.1474-919X.2010.01095.x.
Jones, J.P., Collen, B., Baxter, P.W., Bubb, P., Illian, J., Katzner, T.E., Keane, A., Loh, J., McDonald-Madden, E., Nicholson, E., Pereira, H., Possingham, H., Pullin, A., Rodrigues, A., Ruiz-Gutierrez, V., Sommerville, M., Milner-Gulland, E.J., 2011, The Why, What, and How of Global Biodiversity Indicators Beyond the 2010 Target: Conservation Biology, v. 25, no. 3, p. 450-457, https://doi.org/10.1111/j.1523-1739.2010.01605.x.
Terraube, J., Arroyo, B.E., Mougeot, F., Katzner, T.E., Bragin, E., 2010, Breeding biology of the Montagu’s harrier (Circus pygargus) in north-central Kazakhstan: Journal of Ornithology, v. 151, no. 3, p. 713-722, https://doi.org/10.1007/s10336-010-0505-0.
Rudnick, J.A., Katzner, T.E., DeWoody, J.A., 2009, Genetic Analyses of Noninvasively Collected Feathers Can Provide Insights into Avian Demography and Behavior In Aronoff, J.B., ed., Handbook of Nature Conservation: Hauppauge, NY, Nova Science Publishers, p. 181-197.
Miller, T.M., Brandes, D., Lanzone, M., Ombalski, D., Maisonnueve, C., Katzner, T.E., 2009, Golden eagle migration and winter behavior in Pennsylvania In Majumdar, S.K., ed., Avian Ecology and Conservation: A Pennsylvania Focus with National Implications: Immaculata, PA, Pennsylvania Academy of Sciences, p. 111-125.
Brandes, D., Miller, T.M., Katzner, T.E., 2009, Wind Power Mortality In Majumdar, S.K., ed., Avian Ecology and Conservation: A Pennsylvania Focus with National Implications: Immaculata, PA, Pennsylvania Academy of Sciences, p. 300-303.
Rudnick, J.A., Katzner, T.E., Bragin, E.A., DeWoody, J.A., 2008, A non-invasive genetic evaluation of population size, natal philopatry, and roosting behavior of non-breeding eastern imperial eagles (Aquila heliaca) in central Asia: Conservation Genetics, v. 9, p. 667-676.
Poulakakis, N., Antoniou, A., Mantziou, G., Parmakelis, A., Skartsi, T., Vasilakis, D., Elorriaga, J., De La Puente, J., Gavashelishvili, A., Ghasabyan, M., Katzner, T.E., McGrady, M.J., Batbayar, N., Fuller, M.R., Natsagdorj, T., 2008, Population structure, diversity, and phylogeography in the near-threatened Eurasian black vultures Aegypius monachus (Falconiformes; Accipitridae) in Europe- insights from microsatellite and mitochondrial DNA variation: Biological Journal of the Linnean Society, v. 95, p. 859-872.
Kenward, R., Katzner, T.E., Wink, M., Marcström, V., Walls, S., Karlbom, M., Pfeffer, R., Bragin, E.A., Hodder, K., Levin, A.S., 2007, Rapid sustainability modelling for raptors by radio tagging and DNA fingerprinting: Journal of Wildlife Management, v. 71, no. 1, p. 238-245.
Ryabtsev, V.V., Katzner, T.E., 2007, Severe declines of Eastern Imperial Eagle Aquila heliaca populations in the Baikal region, Russia- a modern and historical perspective: Bird Conservation International, v. 17, no. 03, p. 197-209.
Rudnick, J.A., Katzner, T.E., Bragin, E.A., DeWoody, J.A., 2007, Species identification of birds through genetic analysis of naturally shed feathers: Molecular Ecology Notes, p. 757-762.
Katzner, T.E., Milner-Gulland, E.J., Bragin, E.A., 2007, Using modeling to improve monitoring of structured populations- are we collecting the right data?: Conservation Biology, v. 21, no. 1, p. 241-252.
Katzner, T.E., Bragin, E.A., Milner-Gulland, E.J., 2006, Modelling populations of long lived birds of prey for conservation- a study of Imperial Eagles (Aquila heliaca) in Kazakhstan: Biological Conservation, v. 132, no. 3, p. 322-335.
Katzner, T.E., 2005, Corruption - a double-edged sword for conservation? A response to Smith and Walpole.: Oryx, v. 39, no. 3, p. 260-262.
Katzner, T.E., Robertson, S., Robertson, B., Klucsarits, J., McCarty, K.M., Bildstein, K.L., 2005, Results from a long-term nest-box program for American Kestrels- implications for improved population monitoring and conservation: Journal of Field Ornithology, v. 76, no. 3, p. 217-318.
Busch, J., Katzner, T.E., Bragin, E.A., Keim, P., 2005, Tetranucleotide microsatellites for aquila and haliaeetus eagles: Molecular Ecology Notes, v. 5, no. 1, p. 39-41.
Rudnick, J.A., Katzner, T.E., Bragin, E.A., Rhodes, O.E., DeWoody, J.A., 2005, Using naturally shed feathers for individual identification, genetic parentage analyses, and population monitoring in an endangered Eastern imperial eagle (Aquila heliaca) population from Kazakhstan: Molecular Ecology, v. 14, no. 10, p. 2959-2967.
Katzner, T.E., Hsun Lai, C., Gardiner, J.D., Foggin, J.M., Pearson, D., Smith, A.T., 2004, Adjacent nesting by Lammergeier Gypaetus barbatus and Himalayan Griffon Gyps himalayensis on the Tibetan Plateau, China: Forktail, v. 20, p. 94-96.
Leppert, L.L., Layman, S., Bragin, E.A., Katzner, T.E., 2004, Survey for Hemoparasites in Imperial Eagles (Aquila heliaca), Steppe Eagles (Aquila nipalensis), and White-tailed Sea Eagles (Haliaeetus albicilla) from Kazakhstan: Journal of Wildlife Diseases, v. 40, no. 2, p. 316-319.
Sharik, T.L., Katzner, T.E., Bragina, T.M., 2003, A new species of Copidosoma Ratzeburg (Hymenoptera- Encyrtidae) from eagle nests in Kazakhstan: Journal of Hymenoptera Research, v. 12, no. 2, p. 308-311.
Pain, D.J., Cunningham, P.G., Donald, P.F., Duckworth, J.W., Houston, D.C., Katzner, T.E., Parry-Jones, J., Poole, C., Prakash, V., Round, P., Timmins, R., 2003, Causes and impacts of temporospatial declines of Gypsvultures in Asia: Conservation Biology, v. 17, no. 3, p. 661-671.
Katzner, T.E., Parker, K.L., 1998, Long distance movements from established burrow sites by pygmy rabbits (Brachylagus idahoensis) in southwestern Wyoming: Northwest Naturalist, v. 79, no. 2, p. 72-74.
Katzner, T.E., Cruz, Y.P., 1998, Survival of the Polyembryonic Parasitoid Copidosomopsis tanytmema (Hymenoptera- Encyrtidae) in Envenomized Larvae of its Host Anagasta kuehniella (Lepidoptera- Pyralidae): Annals of the Entomological Society of America, v. 91, no. 6, p. 808-812.
Katzner, T.E., Parker, K.L., Hardegree, S.P., 1997, Metabolism and Thermal Response in Winter-Acclimatized Pygmy Rabbits (Brachylagus idahoensis): Journal of Mammalogy, v. 78, no. 4, p. 1053-1062.
Katzner, T.E., Parker, K.L., 1997, Vegetative Characteristics and Size of Home Ranges Used by Pygmy Rabbits (Brachylagus idahoensis) during Winter: Journal of Mammalogy, v. 78, no. 4, p. 1063-1072.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
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