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
Breeding Bird Survey and bird banding data: Applications to raptor research and management Breeding Bird Survey and bird banding data: Applications to raptor research and management
The Breeding Bird Survey (BBS) and Bird Banding Laboratory (BBL) are sources of information for raptor biologists. The BBS has been conducted each year since 1966 in the United States and Canada; historical bird banding records extend back to the early 20th century. BBS data can be used to document population trends and breeding distributions of many bird species. Banding data are...
Authors
J.R. Sauer, Sam Droege, D. Bystrak
Survey Designs and Statistical Methods for the Estimation of Avian Population Trends Survey Designs and Statistical Methods for the Estimation of Avian Population Trends
No abstract available.
Authors
J.R. Sauer, Sam Droege
Recent population trends of the eastern bluebird Recent population trends of the eastern bluebird
North American Breeding Bird Survey data for the period 1966-1987 indicate that Eastern Bluebird (Sialia sialis) populations declined during the 1970s, primarily in association with either severe winters or severe spring storms. In recent years, bluebird populations have increased to levels similar to those observed during the first year (1966) of the survey. Survey results suggest that...
Authors
J.R. Sauer, Sam Droege
Adaptations to tidal marshes in breeding populations of the swamp sparrow Adaptations to tidal marshes in breeding populations of the swamp sparrow
The Coastal Plain Swamp Sparrow (Melospiza georgiana nigrescens) was originally described from a small number of specimens from the tidal marshes of the Nanticoke River in southeastern Maryland. Based on our quantitative analysis of a larger series of specimens, we found that Swamp Sparrows collected during the breeding season from the Chesapeak and Delaware bays (and tributaries) and...
Authors
R. Greenberg, Sam Droege
Wood duck population trends from the North American Breeding Bird Survey Wood duck population trends from the North American Breeding Bird Survey
The North American Breeding Bird Survey (BBS) has been conducted yearly since 1966, and can be used to describe relative population density and trends of birds in North America north of Mexico. Wood ducks (Air sponsa) are difficult to survey using conventional waterfowl monitoring techniques, but a large portion of their range is surveyed by the BBS. Wood ducks are detected at low...
Authors
J.R. Sauer, Sam Droege
Estimation of annual indices from roadside surveys Estimation of annual indices from roadside surveys
Most of the surveys presently used to estimate population trends on a large geographic scale depend upon repeated visits to a number of randomly selected routes or monitoring points. As these surveys cannot be analyzed by modeling annual mean densities among routes within a region, no natural annual index of population density exists for the region. We discuss two possible methodologies...
Authors
J.R. Sauer, P.H. Geissler
Science and Products
Filter Total Items: 72
Breeding Bird Survey and bird banding data: Applications to raptor research and management Breeding Bird Survey and bird banding data: Applications to raptor research and management
The Breeding Bird Survey (BBS) and Bird Banding Laboratory (BBL) are sources of information for raptor biologists. The BBS has been conducted each year since 1966 in the United States and Canada; historical bird banding records extend back to the early 20th century. BBS data can be used to document population trends and breeding distributions of many bird species. Banding data are...
Authors
J.R. Sauer, Sam Droege, D. Bystrak
Survey Designs and Statistical Methods for the Estimation of Avian Population Trends Survey Designs and Statistical Methods for the Estimation of Avian Population Trends
No abstract available.
Authors
J.R. Sauer, Sam Droege
Recent population trends of the eastern bluebird Recent population trends of the eastern bluebird
North American Breeding Bird Survey data for the period 1966-1987 indicate that Eastern Bluebird (Sialia sialis) populations declined during the 1970s, primarily in association with either severe winters or severe spring storms. In recent years, bluebird populations have increased to levels similar to those observed during the first year (1966) of the survey. Survey results suggest that...
Authors
J.R. Sauer, Sam Droege
Adaptations to tidal marshes in breeding populations of the swamp sparrow Adaptations to tidal marshes in breeding populations of the swamp sparrow
The Coastal Plain Swamp Sparrow (Melospiza georgiana nigrescens) was originally described from a small number of specimens from the tidal marshes of the Nanticoke River in southeastern Maryland. Based on our quantitative analysis of a larger series of specimens, we found that Swamp Sparrows collected during the breeding season from the Chesapeak and Delaware bays (and tributaries) and...
Authors
R. Greenberg, Sam Droege
Wood duck population trends from the North American Breeding Bird Survey Wood duck population trends from the North American Breeding Bird Survey
The North American Breeding Bird Survey (BBS) has been conducted yearly since 1966, and can be used to describe relative population density and trends of birds in North America north of Mexico. Wood ducks (Air sponsa) are difficult to survey using conventional waterfowl monitoring techniques, but a large portion of their range is surveyed by the BBS. Wood ducks are detected at low...
Authors
J.R. Sauer, Sam Droege
Estimation of annual indices from roadside surveys Estimation of annual indices from roadside surveys
Most of the surveys presently used to estimate population trends on a large geographic scale depend upon repeated visits to a number of randomly selected routes or monitoring points. As these surveys cannot be analyzed by modeling annual mean densities among routes within a region, no natural annual index of population density exists for the region. We discuss two possible methodologies...
Authors
J.R. Sauer, P.H. Geissler