Sam Droege
Sam is a Wildlife Biologist at the Eastern Ecological Science Center in Laurel, MD.
Sam has coordinated the North American Breeding Bird Survey Program, developed the North American Amphibian Monitoring Program, the BioBlitz, Cricket Crawl, and FrogwatchUSA programs and worked on the design and evaluation of monitoring programs. Currently he is developing an inventory and monitoring program for native bees, online identification guides for North American bees at discoverlife.org, and reviving the North American Bird Phenology Program.
Education and Certifications
M.S. from State University of New York – Syracuse
B.S. from University of Maryland
Science and Products
Filter Total Items: 71
Leaf litter bags as an index to populations of northern two-lined salamanders (Eurycea bislineata)
Concern about recent amphibian declines has led to research on amphibian populations, but few statistically tested, standardized methods of counting amphibians exist. We tested whether counts of northern two-lined salamander larvae (Eurycea bislineata) sheltered in leaf litter bags--a relatively new, easily replicable survey technique--had a linear correlation to total number of larvae. Using ex
Authors
R.J. Chalmers, Sam Droege
A case for using Plethodontid salamanders for monitoring biodiversity and ecosystem integrity of North American forests
Terrestrial salamanders of the family Plethodontidae have unique attributes that make them excellent indicators of biodiversity and ecosystem integrity in forested habitats. Their longevity, small territory size, site fidelity, sensitivity to natural and anthropogenic perturbations, tendency to occur in high densities, and low sampling costs mean that counts of plethodontid salamanders provide num
Authors
Hartwell H. Welsh, Sam Droege
Evaluation of terrestrial and streamside salamander monitoring techniques at Shenandoah National Park
In response to concerns about amphibian declines, a study evaluating and validating amphibian monitoring techniques was initiated in Shenandoah and Big Bend National Parks in the spring of 1998. We evaluate precision, bias, and efficiency of several sampling methods for terrestrial and streamside salamanders in Shenandoah National Park and assess salamander abundance in relation to environmental v
Authors
R.E. Jung, Sam Droege, J.R. Sauer, R.B. Landy
DC birdscape: a program for monitoring neotropical migrant birds in Washington, DC
Urban and suburban habitats often contain a variety of Neotropical migratory birds, but are poorly sampled by programs such as the North American Breeding Bird Survey. DC Birdscape was developed to inventory and monitor birds in Washington, D.C. Birds were surveyed using a systematic sample of point counts during 1993-1995. Results indicate that species richness of Neotropical migratory birds v
Authors
J.R. Sauer, J. Hadidian, C. Swarth, Sam Droege, P. Handly, G. Diddan, J. Huff
On the decline of the Rusty Blackbird and the use of ornithological literature to document long-term population trends
Unlike most North American blackbirds, Rusty Blackbirds (Euphagus carolensis) have shown steep population declines. Declines of approximately 90% are indicated for three recent decades from the Breeding Bird Survey, Christmas Bird Counts, and Quebec Checklist Program. Analyses of abundance classifications in bird distribution books and annotated checklists reveal an overlooked but long-term declin
Authors
R. Greenberg, Sam Droege
A 12-step program for creating a monitoring program: An extended abstract written in the everyday language of the wildlife biologist
No abstract available.
Authors
Sam Droege
Morphological adaptation with no mitochondrial DNA differentiation in the coastal plain swamp sparrow
We estimated genetic differentiation between morphologically distinct tidal marsh populations of Swamp Sparrows (Melospiza georgiana nigrescens) and the more widespread inland populations (M. g. georgiana and M. g. ericrypta). The tidal marsh populations are consistently grayer with more extensive black markings (particularly in the crown), and their bills are larger. These differences are various
Authors
R. Greenberg, P.J. Cordero, Sam Droege, R.C. Fleischer
Checklists: An under-used tool for the inventory and monitoring of plants and animals
Checklists are widely used to catalog field observations of plants and animals. We used 25 years of bird checklist data from the Études des Populations d’Oiseaux du Quebec program to examine the ability of checklists to produce reliable conservation, management, and ecological information. We found that checklists can provide reliable information on changes in bird populations, phenology, and geog
Authors
Sam Droege, A. Cyr, J. Larivee
Monitoring populations of plants and animals
No abstract available.
Authors
J.P. Gibbs, Sam Droege, P. Eagle
Population trends of black ducks and mallards from the North American Breeding Bird Survey: Are increases in mallards associated with declines in black ducks?
No abstract available.
Authors
J.R. Sauer, Sam Droege
Science and Products
Filter Total Items: 71
Leaf litter bags as an index to populations of northern two-lined salamanders (Eurycea bislineata)
Concern about recent amphibian declines has led to research on amphibian populations, but few statistically tested, standardized methods of counting amphibians exist. We tested whether counts of northern two-lined salamander larvae (Eurycea bislineata) sheltered in leaf litter bags--a relatively new, easily replicable survey technique--had a linear correlation to total number of larvae. Using ex
Authors
R.J. Chalmers, Sam Droege
A case for using Plethodontid salamanders for monitoring biodiversity and ecosystem integrity of North American forests
Terrestrial salamanders of the family Plethodontidae have unique attributes that make them excellent indicators of biodiversity and ecosystem integrity in forested habitats. Their longevity, small territory size, site fidelity, sensitivity to natural and anthropogenic perturbations, tendency to occur in high densities, and low sampling costs mean that counts of plethodontid salamanders provide num
Authors
Hartwell H. Welsh, Sam Droege
Evaluation of terrestrial and streamside salamander monitoring techniques at Shenandoah National Park
In response to concerns about amphibian declines, a study evaluating and validating amphibian monitoring techniques was initiated in Shenandoah and Big Bend National Parks in the spring of 1998. We evaluate precision, bias, and efficiency of several sampling methods for terrestrial and streamside salamanders in Shenandoah National Park and assess salamander abundance in relation to environmental v
Authors
R.E. Jung, Sam Droege, J.R. Sauer, R.B. Landy
DC birdscape: a program for monitoring neotropical migrant birds in Washington, DC
Urban and suburban habitats often contain a variety of Neotropical migratory birds, but are poorly sampled by programs such as the North American Breeding Bird Survey. DC Birdscape was developed to inventory and monitor birds in Washington, D.C. Birds were surveyed using a systematic sample of point counts during 1993-1995. Results indicate that species richness of Neotropical migratory birds v
Authors
J.R. Sauer, J. Hadidian, C. Swarth, Sam Droege, P. Handly, G. Diddan, J. Huff
On the decline of the Rusty Blackbird and the use of ornithological literature to document long-term population trends
Unlike most North American blackbirds, Rusty Blackbirds (Euphagus carolensis) have shown steep population declines. Declines of approximately 90% are indicated for three recent decades from the Breeding Bird Survey, Christmas Bird Counts, and Quebec Checklist Program. Analyses of abundance classifications in bird distribution books and annotated checklists reveal an overlooked but long-term declin
Authors
R. Greenberg, Sam Droege
A 12-step program for creating a monitoring program: An extended abstract written in the everyday language of the wildlife biologist
No abstract available.
Authors
Sam Droege
Morphological adaptation with no mitochondrial DNA differentiation in the coastal plain swamp sparrow
We estimated genetic differentiation between morphologically distinct tidal marsh populations of Swamp Sparrows (Melospiza georgiana nigrescens) and the more widespread inland populations (M. g. georgiana and M. g. ericrypta). The tidal marsh populations are consistently grayer with more extensive black markings (particularly in the crown), and their bills are larger. These differences are various
Authors
R. Greenberg, P.J. Cordero, Sam Droege, R.C. Fleischer
Checklists: An under-used tool for the inventory and monitoring of plants and animals
Checklists are widely used to catalog field observations of plants and animals. We used 25 years of bird checklist data from the Études des Populations d’Oiseaux du Quebec program to examine the ability of checklists to produce reliable conservation, management, and ecological information. We found that checklists can provide reliable information on changes in bird populations, phenology, and geog
Authors
Sam Droege, A. Cyr, J. Larivee
Monitoring populations of plants and animals
No abstract available.
Authors
J.P. Gibbs, Sam Droege, P. Eagle
Population trends of black ducks and mallards from the North American Breeding Bird Survey: Are increases in mallards associated with declines in black ducks?
No abstract available.
Authors
J.R. Sauer, Sam Droege