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
DNA Barcoding for Identifying Native Bee Species
The Challenge: Traditionally, bee identification has relied on taxonomic methods centered on descriptions of morphological differences between species. However, for many species, separate keys are required for identifying adult males and females and immature life stages. These keys are commonly unavailable. The lack of distinguishing morphological characters useful for separating closely related...
North American Bird Phenology Program
The Challenge: The North American Bird Phenology Program (BPP) houses a data set of 6 million historical observations of over 800 bird species, documenting occurrences and migration times from the 1880s through the 1970s -- the longest and most comprehensive legacy data set on bird migration in existence. In an effort to rescue this invaluable data set, the BPP has scanned and are in the process...
Filter Total Items: 72
Detecting insect pollinator declines on regional and global scales Detecting insect pollinator declines on regional and global scales
Recently there has been considerable concern about declines in bee communities in agricultural and natural habitats. The value of pollination to agriculture, provided primarily by bees, is >$200 billion/year worldwide, and in natural ecosystems it is thought to be even greater. However, no monitoring program exists to accurately detect declines in abundance of insect pollinators; thus...
Authors
Gretchen Lubuhn, Sam Droege, Edward F. Connor, Barbara Gemmill-Herren, Simon G. Potts, Robert L. Minckley, Terry Griswold, Robert Jean, Emanuel Kula, David W. Roubik, Jim Cane, Karen W. Wright, Gordon Frankie, Frank Parker
Spatial patterns of bee captures in North American bowl trapping surveys Spatial patterns of bee captures in North American bowl trapping surveys
1. Bowl and pan traps are now commonly used to capture bees (Hymenoptera: Apiformes) for research and surveys. 2. Studies of how arrangement and spacing of bowl traps affect captures of bees are needed to increase the efficiency of this capture technique. 3. We present results from seven studies of bowl traps placed in trapping webs, grids, and transects in four North American ecoregions...
Authors
Sam Droege, Vincent J. Tepedino, Gretchen Lebuhn, William Link, Robert L. Minckley, Qian Chen, Casey Conrad
New synonymies in the bee genus Nomada from North America (Hymenoptera: Apidae) New synonymies in the bee genus Nomada from North America (Hymenoptera: Apidae)
We provide diagnostic morphological characters to help distinguish males and females of the following species of Nomada: N. augustiana Mitchell, N. bethunei Cockerell, N. fervida Smith, N. fragariae Mitchell, N. lehighensis Cockerell, N. texana Cresson, and N. tiftonensis Cockerell. Based on morphological and DNA barcoding evidence we newly synonymize the following species: N...
Authors
Sam Droege, M.G. Rightmyer, C.S. Sheffield, S.G. Brady
The lost micro-deserts of the Patuxent River using landscape history, insect and plant specimens, and field work to detect and define a unique community The lost micro-deserts of the Patuxent River using landscape history, insect and plant specimens, and field work to detect and define a unique community
Historical and recent records of both plants and insects are synthesized for uplands along the eastern edge of Maryland?s Patuxent River from the edge of the Piedmont south to Jug Bay. This strip is characterized by deep sandy soils found in the Evesboro and Galestown sandy loams soil series. Within this narrow strip there exists a unique flora and fauna adapted to open dry sandy soils...
Authors
Sam Droege, C.A. Davis, W.E. Steiner, J. Mawdsley
Long-term decline and short-term crash of the once abundant Rusty Blackbird Long-term decline and short-term crash of the once abundant Rusty Blackbird
The Rusty Blackbird (Euphagus carolinus), a formerly common breeding species of boreal wetlands, has exhibited the most marked decline of any North American landbird. North American Breeding Bird Survey (BBS) trends in abundance are estimated to be -12.5% / yr over the last 40 years, which is tantamount to a >95% cumulative decline. Trends in abundance calculated from Christmas Bird...
Authors
R. Greenberg, P. Blancher, D. Niven, Sam Droege
Long-term trends in breeding birds in an old-growth Adirondack forest and the surrounding region Long-term trends in breeding birds in an old-growth Adirondack forest and the surrounding region
Breeding bird populations were sampled between 1954 and 1963, and 1990 and 2000 in an old-growth forest, the Natural Area of Huntington Wildlife Forest (HWF), in the Adirondack Mountains of New York. Trends were compared with data from regional North American Breeding Bird Surveys (BBS) and from a forest plot at Hubbard Brook Experimental Forest, New Hampshire. Trends for 22 species in...
Authors
S.A. McNulty, Sam Droege, R.D. Masters
Science and Products
DNA Barcoding for Identifying Native Bee Species
The Challenge: Traditionally, bee identification has relied on taxonomic methods centered on descriptions of morphological differences between species. However, for many species, separate keys are required for identifying adult males and females and immature life stages. These keys are commonly unavailable. The lack of distinguishing morphological characters useful for separating closely related...
North American Bird Phenology Program
The Challenge: The North American Bird Phenology Program (BPP) houses a data set of 6 million historical observations of over 800 bird species, documenting occurrences and migration times from the 1880s through the 1970s -- the longest and most comprehensive legacy data set on bird migration in existence. In an effort to rescue this invaluable data set, the BPP has scanned and are in the process...
Filter Total Items: 72
Detecting insect pollinator declines on regional and global scales Detecting insect pollinator declines on regional and global scales
Recently there has been considerable concern about declines in bee communities in agricultural and natural habitats. The value of pollination to agriculture, provided primarily by bees, is >$200 billion/year worldwide, and in natural ecosystems it is thought to be even greater. However, no monitoring program exists to accurately detect declines in abundance of insect pollinators; thus...
Authors
Gretchen Lubuhn, Sam Droege, Edward F. Connor, Barbara Gemmill-Herren, Simon G. Potts, Robert L. Minckley, Terry Griswold, Robert Jean, Emanuel Kula, David W. Roubik, Jim Cane, Karen W. Wright, Gordon Frankie, Frank Parker
Spatial patterns of bee captures in North American bowl trapping surveys Spatial patterns of bee captures in North American bowl trapping surveys
1. Bowl and pan traps are now commonly used to capture bees (Hymenoptera: Apiformes) for research and surveys. 2. Studies of how arrangement and spacing of bowl traps affect captures of bees are needed to increase the efficiency of this capture technique. 3. We present results from seven studies of bowl traps placed in trapping webs, grids, and transects in four North American ecoregions...
Authors
Sam Droege, Vincent J. Tepedino, Gretchen Lebuhn, William Link, Robert L. Minckley, Qian Chen, Casey Conrad
New synonymies in the bee genus Nomada from North America (Hymenoptera: Apidae) New synonymies in the bee genus Nomada from North America (Hymenoptera: Apidae)
We provide diagnostic morphological characters to help distinguish males and females of the following species of Nomada: N. augustiana Mitchell, N. bethunei Cockerell, N. fervida Smith, N. fragariae Mitchell, N. lehighensis Cockerell, N. texana Cresson, and N. tiftonensis Cockerell. Based on morphological and DNA barcoding evidence we newly synonymize the following species: N...
Authors
Sam Droege, M.G. Rightmyer, C.S. Sheffield, S.G. Brady
The lost micro-deserts of the Patuxent River using landscape history, insect and plant specimens, and field work to detect and define a unique community The lost micro-deserts of the Patuxent River using landscape history, insect and plant specimens, and field work to detect and define a unique community
Historical and recent records of both plants and insects are synthesized for uplands along the eastern edge of Maryland?s Patuxent River from the edge of the Piedmont south to Jug Bay. This strip is characterized by deep sandy soils found in the Evesboro and Galestown sandy loams soil series. Within this narrow strip there exists a unique flora and fauna adapted to open dry sandy soils...
Authors
Sam Droege, C.A. Davis, W.E. Steiner, J. Mawdsley
Long-term decline and short-term crash of the once abundant Rusty Blackbird Long-term decline and short-term crash of the once abundant Rusty Blackbird
The Rusty Blackbird (Euphagus carolinus), a formerly common breeding species of boreal wetlands, has exhibited the most marked decline of any North American landbird. North American Breeding Bird Survey (BBS) trends in abundance are estimated to be -12.5% / yr over the last 40 years, which is tantamount to a >95% cumulative decline. Trends in abundance calculated from Christmas Bird...
Authors
R. Greenberg, P. Blancher, D. Niven, Sam Droege
Long-term trends in breeding birds in an old-growth Adirondack forest and the surrounding region Long-term trends in breeding birds in an old-growth Adirondack forest and the surrounding region
Breeding bird populations were sampled between 1954 and 1963, and 1990 and 2000 in an old-growth forest, the Natural Area of Huntington Wildlife Forest (HWF), in the Adirondack Mountains of New York. Trends were compared with data from regional North American Breeding Bird Surveys (BBS) and from a forest plot at Hubbard Brook Experimental Forest, New Hampshire. Trends for 22 species in...
Authors
S.A. McNulty, Sam Droege, R.D. Masters