Colleen Handel, Ph.D.
Population ecology of passerines and shorebirds, behavioral ecology, population monitoring, and sampling design.
Professional Experience
1996 - Present Research Wildlife Biologist, USGS, Alaska Science Center, Anchorage, Alaska
1993 - 1996 Research Wildlife Biologist, NBS, Alaska Science Center, Anchorage, Alaska
1978 - 1993 Research Wildlife Biologist, USFWS, Alaska Fish and Wildlife Research Center, Anchorage, Alaska
1977 - 1978 Research/ Teaching Assistant, University of California Davis, Davis, California
1975 - 1978 Biological Science Technician, U.S. Fish & Wildlife Service, Anchorage, Alaska
1975 - 1975 Biological Science Aide, Kenai National Wildlife Refuge, U.S. Fish & Wildlife Service, Kenai, Alaska
1974 - 1974 Botany and Ornithology Instructor, Murray Rhode School, Newton Public High Schools, Newton, Massachusetts
1972 - 1972 Assistant Curator, Farlow Herbarium, Harvard University, Cambridge, Massachusetts
1972 - 1972 Research Assistant, Concord Field Station, Harvard University, Cambridge, Massachusetts
Education and Certifications
Ph.D. 2002 University of California Davis, Davis, CA Ecology
M.S. 1982 University of California Davis, Davis, CA Ecology
B.A. 1974 Harvard University, Cambridge, MA Biological Sciences
Affiliations and Memberships*
American Association for the Advancement of Science
American Ornithological Society (Fellow, Deputy Editor)
Association of Field Ornithologists
Colonial Waterbird Group
Ecological Society of America
Pacific Seabird Group
Society for Conservation Biology
Wader Study Group
Wildlife Society
Wilson Ornithological Society
Science and Products
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Evidence of accelerated beak growth associated with avian keratin disorder in black-capped chickadees (Poecile atricapillus) Evidence of accelerated beak growth associated with avian keratin disorder in black-capped chickadees (Poecile atricapillus)
We recently documented an epizootic of beak deformities in more than 2,000 Black-capped Chickadees (Poecile atricapillus) and other wild bird species in North America. This emerging avian disease, which has been termed avian keratin disorder, results in gross overgrowth of the rhamphotheca, the outer, keratinized layer of the beak. To test the hypothesis that the beak deformities...
Authors
Caroline R. Van Hemert, Colleen M. Handel, Todd M. O'Hara
Microanatomy of passerine hard-cornified tissues: Beak and claw structure of the black-capped chickadee (Poecile atricapillus) Microanatomy of passerine hard-cornified tissues: Beak and claw structure of the black-capped chickadee (Poecile atricapillus)
The microanatomy of healthy beaks and claws in passerine birds has not been well described in the literature, despite the importance of these structures in avian life. Histological processing of hard‐cornified tissues is notoriously challenging and only a few reports on effective techniques have been published. An emerging epizootic of beak deformities among wild birds in Alaska and the...
Authors
Caroline R. Van Hemert, Colleen M. Handel, John E. Blake, Rhonda Swor, Todd M. O'Hara
Small population size of Pribilof Rock Sandpipers confirmed through distance-sampling surveys in Alaska Small population size of Pribilof Rock Sandpipers confirmed through distance-sampling surveys in Alaska
The Rock Sandpiper (Calidris ptilocnemis) is endemic to the Bering Sea region and unique among shorebirds in the North Pacific for wintering at high latitudes. The nominate subspecies, the Pribilof Rock Sandpiper (C. p. ptilocnemis), breeds on four isolated islands in the Bering Sea and appears to spend the winter primarily in Cook Inlet, Alaska. We used a stratified systematic sampling...
Authors
Daniel R. Ruthrauff, T. Lee Tibbitts, Robert E. Gill, Maksim N. Dementyev, Colleen M. Handel
Stable isotopes identify dietary changes associated with beak deformities in Black-Capped Chickadees (Poecile atricapillus) Stable isotopes identify dietary changes associated with beak deformities in Black-Capped Chickadees (Poecile atricapillus)
A large number of beak deformities of unknown etiology have recently been reported in Black-capped Chickadees (Poecile atricapillus) and other resident avian species in Alaska. We investigated the potential association between diet and beak deformities. We analyzed carbon (δ13C) and nitrogen (δ15N) isotopes in whole blood of Black-capped Chickadees captured at three semiurban sites in...
Authors
Caroline R. Van Hemert, Colleen M. Handel, Diane M. O’Brien
Paired serologic and polymerase chain reaction analyses of avian influenza prevalence in Alaskan shorebirds Paired serologic and polymerase chain reaction analyses of avian influenza prevalence in Alaskan shorebirds
Surveillance has revealed low prevalence of avian influenza viruses (AIV) in shorebirds except Ruddy Turnstones (Arenaria interpres) on the North American Atlantic coast. Similarly, of five species of shorebirds surveyed in Alaska in 2010, Ruddy Turnstones had the highest AIV antibody prevalence; prevalence of AIV RNA was low or zero.
Authors
John M. Pearce, Daniel R. Ruthrauff, Jeffrey S. Hall
A natural experiment on the condition-dependence of achromatic plumage reflectance in black-capped chickadees A natural experiment on the condition-dependence of achromatic plumage reflectance in black-capped chickadees
Honest advertisement models posit that only individuals in good health can produce and/or maintain ornamental traits. Even though disease has profound effects on condition, few studies have experimentally tested its effects on trait expression and even fewer have identified a mechanistic basis for these effects. Recent evidence suggests that black and white, but not grey, plumage colors...
Authors
L. D'Alba, Caroline R. Van Hemert, Colleen M. Handel, M.D. Shawkey
Science and Products
Filter Total Items: 20
Filter Total Items: 18
No Result Found
Filter Total Items: 92
Evidence of accelerated beak growth associated with avian keratin disorder in black-capped chickadees (Poecile atricapillus) Evidence of accelerated beak growth associated with avian keratin disorder in black-capped chickadees (Poecile atricapillus)
We recently documented an epizootic of beak deformities in more than 2,000 Black-capped Chickadees (Poecile atricapillus) and other wild bird species in North America. This emerging avian disease, which has been termed avian keratin disorder, results in gross overgrowth of the rhamphotheca, the outer, keratinized layer of the beak. To test the hypothesis that the beak deformities...
Authors
Caroline R. Van Hemert, Colleen M. Handel, Todd M. O'Hara
Microanatomy of passerine hard-cornified tissues: Beak and claw structure of the black-capped chickadee (Poecile atricapillus) Microanatomy of passerine hard-cornified tissues: Beak and claw structure of the black-capped chickadee (Poecile atricapillus)
The microanatomy of healthy beaks and claws in passerine birds has not been well described in the literature, despite the importance of these structures in avian life. Histological processing of hard‐cornified tissues is notoriously challenging and only a few reports on effective techniques have been published. An emerging epizootic of beak deformities among wild birds in Alaska and the...
Authors
Caroline R. Van Hemert, Colleen M. Handel, John E. Blake, Rhonda Swor, Todd M. O'Hara
Small population size of Pribilof Rock Sandpipers confirmed through distance-sampling surveys in Alaska Small population size of Pribilof Rock Sandpipers confirmed through distance-sampling surveys in Alaska
The Rock Sandpiper (Calidris ptilocnemis) is endemic to the Bering Sea region and unique among shorebirds in the North Pacific for wintering at high latitudes. The nominate subspecies, the Pribilof Rock Sandpiper (C. p. ptilocnemis), breeds on four isolated islands in the Bering Sea and appears to spend the winter primarily in Cook Inlet, Alaska. We used a stratified systematic sampling...
Authors
Daniel R. Ruthrauff, T. Lee Tibbitts, Robert E. Gill, Maksim N. Dementyev, Colleen M. Handel
Stable isotopes identify dietary changes associated with beak deformities in Black-Capped Chickadees (Poecile atricapillus) Stable isotopes identify dietary changes associated with beak deformities in Black-Capped Chickadees (Poecile atricapillus)
A large number of beak deformities of unknown etiology have recently been reported in Black-capped Chickadees (Poecile atricapillus) and other resident avian species in Alaska. We investigated the potential association between diet and beak deformities. We analyzed carbon (δ13C) and nitrogen (δ15N) isotopes in whole blood of Black-capped Chickadees captured at three semiurban sites in...
Authors
Caroline R. Van Hemert, Colleen M. Handel, Diane M. O’Brien
Paired serologic and polymerase chain reaction analyses of avian influenza prevalence in Alaskan shorebirds Paired serologic and polymerase chain reaction analyses of avian influenza prevalence in Alaskan shorebirds
Surveillance has revealed low prevalence of avian influenza viruses (AIV) in shorebirds except Ruddy Turnstones (Arenaria interpres) on the North American Atlantic coast. Similarly, of five species of shorebirds surveyed in Alaska in 2010, Ruddy Turnstones had the highest AIV antibody prevalence; prevalence of AIV RNA was low or zero.
Authors
John M. Pearce, Daniel R. Ruthrauff, Jeffrey S. Hall
A natural experiment on the condition-dependence of achromatic plumage reflectance in black-capped chickadees A natural experiment on the condition-dependence of achromatic plumage reflectance in black-capped chickadees
Honest advertisement models posit that only individuals in good health can produce and/or maintain ornamental traits. Even though disease has profound effects on condition, few studies have experimentally tested its effects on trait expression and even fewer have identified a mechanistic basis for these effects. Recent evidence suggests that black and white, but not grey, plumage colors...
Authors
L. D'Alba, Caroline R. Van Hemert, Colleen M. Handel, M.D. Shawkey
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government