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: 72
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
Next steps for the North American Amphibian Monitoring Program
No abstract available.
Authors
Sam Droege
A heuristic approach to validating monitoring programs based on count indices (damn the statisticians, full speed ahead)
No abstract available.
Authors
Sam Droege
A proposed North American amphibian monitoring program
No abstract available.
Authors
C. Bishop, D. Bradford, G. Casper, S. Corn, Sam Droege, G. Fellers, P. Geissler, D.M. Green, R. Heyer, M. Lannoo, D. Larson, D. Johnson, R. McDiarmid, J. Sauer, B. Shaffer, H. Whiteman, H. Wilbur
Monitoring Bird Populations by Point Counts
No abstract available.
The Summer Atlas of North American Birds
The North American Breeding Bird Survey comprises a network of regularly censussed, road-based survey routes and constitutes the most comprehensive set of data on the relative abundance and population trends of these birds during the summer months. Its value was highlighted in 1989, when the data were used to confirm suspected population declines in a number of species of neotropical migrants bree
Authors
J. Price, Sam Droege, A. Price
Managing and monitoring birds using point counts: Standards and applications
No abstract available.
Authors
C.J. Ralph, Sam Droege, J.R. Sauer
Mapping of bird distributions from point count surveys
Maps generated from bird survey data are used for a variety of scientific purposes, but little is known about their bias and precision. We review methods for preparing maps from point count data and appropriate sampling methods for maps based on point counts. Maps based on point counts can be affected by bias associated with incomplete counts, primarily due to changes in proportion counted as a
Authors
J.R. Sauer, G.W. Pendleton, Sandra Orsillo
Statistical aspects of point count sampling
The dominant feature of point counts is that they do not census birds, but instead provide incomplete counts of individuals present within a survey plot. Considering a simple model for point count sampling, we demon-strate that use of these incomplete counts can bias estimators and testing procedures, leading to inappropriate conclusions. A large portion of the variability in point counts is cau
Authors
R. J. Barker, J.R. Sauer
Are more North American species decreasing than increasing?
Population trends for North American species are calculated for 1966-'91 and 1982-'91 using Nonh American Breeding Bird Survey data. Species are grouped into 3 systems of guild classifications representing migration status, breeding habitat and nesting substrate. Trends for these groups are summarized by time period, bioregion and physiographic region. At the continental level, declines approximat
Authors
Sam Droege, J.R. Sauer
Science and Products
Filter Total Items: 72
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
Next steps for the North American Amphibian Monitoring Program
No abstract available.
Authors
Sam Droege
A heuristic approach to validating monitoring programs based on count indices (damn the statisticians, full speed ahead)
No abstract available.
Authors
Sam Droege
A proposed North American amphibian monitoring program
No abstract available.
Authors
C. Bishop, D. Bradford, G. Casper, S. Corn, Sam Droege, G. Fellers, P. Geissler, D.M. Green, R. Heyer, M. Lannoo, D. Larson, D. Johnson, R. McDiarmid, J. Sauer, B. Shaffer, H. Whiteman, H. Wilbur
Monitoring Bird Populations by Point Counts
No abstract available.
The Summer Atlas of North American Birds
The North American Breeding Bird Survey comprises a network of regularly censussed, road-based survey routes and constitutes the most comprehensive set of data on the relative abundance and population trends of these birds during the summer months. Its value was highlighted in 1989, when the data were used to confirm suspected population declines in a number of species of neotropical migrants bree
Authors
J. Price, Sam Droege, A. Price
Managing and monitoring birds using point counts: Standards and applications
No abstract available.
Authors
C.J. Ralph, Sam Droege, J.R. Sauer
Mapping of bird distributions from point count surveys
Maps generated from bird survey data are used for a variety of scientific purposes, but little is known about their bias and precision. We review methods for preparing maps from point count data and appropriate sampling methods for maps based on point counts. Maps based on point counts can be affected by bias associated with incomplete counts, primarily due to changes in proportion counted as a
Authors
J.R. Sauer, G.W. Pendleton, Sandra Orsillo
Statistical aspects of point count sampling
The dominant feature of point counts is that they do not census birds, but instead provide incomplete counts of individuals present within a survey plot. Considering a simple model for point count sampling, we demon-strate that use of these incomplete counts can bias estimators and testing procedures, leading to inappropriate conclusions. A large portion of the variability in point counts is cau
Authors
R. J. Barker, J.R. Sauer
Are more North American species decreasing than increasing?
Population trends for North American species are calculated for 1966-'91 and 1982-'91 using Nonh American Breeding Bird Survey data. Species are grouped into 3 systems of guild classifications representing migration status, breeding habitat and nesting substrate. Trends for these groups are summarized by time period, bioregion and physiographic region. At the continental level, declines approximat
Authors
Sam Droege, J.R. Sauer