Paul Cryan, PhD (Former Employee)
Science and Products
Filter Total Items: 88
Chemistry & migration mysteries: Fur holds clues to previous journeys Chemistry & migration mysteries: Fur holds clues to previous journeys
The bat was not only pregnant but downright angry as I snipped a bit of fur from her back. Within a few seconds, however, she flapped her powerful wings, took off from my hand and disappeared into the night, rejoining thousands of female hoary bats (Lasiurus cinereus) on their migration through the mountains of New Mexico. Every spring, hundreds of these expectant mothers pass through...
Authors
Paul M. Cryan
Seasonal distribution of migratory tree bats (Lasiurus and Lasionycteris) in North America Seasonal distribution of migratory tree bats (Lasiurus and Lasionycteris) in North America
Despite evidence of migration in North American tree bats (genera Lasiurus and Lasionycteris), details regarding seasonal movements in these widely distributed species are few. This study attempted to clarify patterns of seasonal distribution by mapping museum occurrence records by month. Monthly changes in the distribution of records indicate seasonal movements of tree bats. Northward...
Authors
Paul M. Cryan
Western crevice and cavity-roosting bats Western crevice and cavity-roosting bats
Among the 45 species of bats that occur in the United States (U.S.), 34 species regularly occur in western regions of the country. Many of these “western” species choose roost sites in crevices or cavities. Herein we provide an introduction to the biology of bats that roost in cavities and crevices and assess the challenges and opportunities associated with monitoring their populations...
Authors
Michael A. Bogan, Paul M. Cryan, Ernest W. Valdez, Laura E. Ellison, Thomas J. O’Shea
Recurrence of Mexican long-tongued bats (Choeronycteris mexicana) at historical sites in Arizona and New Mexico Recurrence of Mexican long-tongued bats (Choeronycteris mexicana) at historical sites in Arizona and New Mexico
The Mexican long-tongued bat (Choeronycteris mexicana) is a nectar-eating species that seasonally inhabits the southwestern United States. Since 1906, fewer than 1500 individuals of C. mexicana have been documented throughout the range of the species. We conducted a field survey in Arizona and New Mexico during summer 1999 to check historically occupied areas for recurrence of C...
Authors
P.M. Cryan, M.A. Bogan
Western crevice and cavity-roosting bats Western crevice and cavity-roosting bats
Among the 45 species of bats that occur in the United States (U.S.), 34 species regularly occur in western regions of the country. Many of these “western” species choose roost sites in crevices or cavities. Herein we provide an introduction to the biology of bats that roost in cavities and crevices and assess the challenges and opportunities associated with monitoring their populations...
Authors
Michael A. Bogan, Paul M. Cryan, Ernest W. Valdez, Laura E. Ellison, Thomas J. O’Shea
Non-USGS Publications**
Cryan, P.M. 1997. Distribution and roosting habits of bats in the southern Black Hills, South Dakota [M.S. Thesis]. Albuquerque, NM: University of New Mexico. 98 p.
Perry, T.W., P.M. Cryan, S.R. Davenport, and M.A. Bogan. 1997. New locality for Euderma maculatum (Chiroptera: vespertilionidae) in New Mexico. Southwestern Naturalist. 42(1): 99-10.
Bogan, M.A., T.J. O’Shea, P.M. Cryan, A.M. Ditto, W.H. Shaedla, and L. Ellison. 1996. Status and trends of bat populations at Los Alamos National Laboratory and Bandelier National Monument, Jemez Mountains, New Mexico. Annual report to Los Alamos National Laboratory and Bandelier National Monument. 1-18 p.
Cryan, P.M. and M.A. Bogan. 1995. Ecology and distribution of bats in the southern Black Hills: Annual report to cooperators. Annual report prepared for Jewel Cave National Monument, National Park Service, Custer, SD. 23 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 88
Chemistry & migration mysteries: Fur holds clues to previous journeys Chemistry & migration mysteries: Fur holds clues to previous journeys
The bat was not only pregnant but downright angry as I snipped a bit of fur from her back. Within a few seconds, however, she flapped her powerful wings, took off from my hand and disappeared into the night, rejoining thousands of female hoary bats (Lasiurus cinereus) on their migration through the mountains of New Mexico. Every spring, hundreds of these expectant mothers pass through...
Authors
Paul M. Cryan
Seasonal distribution of migratory tree bats (Lasiurus and Lasionycteris) in North America Seasonal distribution of migratory tree bats (Lasiurus and Lasionycteris) in North America
Despite evidence of migration in North American tree bats (genera Lasiurus and Lasionycteris), details regarding seasonal movements in these widely distributed species are few. This study attempted to clarify patterns of seasonal distribution by mapping museum occurrence records by month. Monthly changes in the distribution of records indicate seasonal movements of tree bats. Northward...
Authors
Paul M. Cryan
Western crevice and cavity-roosting bats Western crevice and cavity-roosting bats
Among the 45 species of bats that occur in the United States (U.S.), 34 species regularly occur in western regions of the country. Many of these “western” species choose roost sites in crevices or cavities. Herein we provide an introduction to the biology of bats that roost in cavities and crevices and assess the challenges and opportunities associated with monitoring their populations...
Authors
Michael A. Bogan, Paul M. Cryan, Ernest W. Valdez, Laura E. Ellison, Thomas J. O’Shea
Recurrence of Mexican long-tongued bats (Choeronycteris mexicana) at historical sites in Arizona and New Mexico Recurrence of Mexican long-tongued bats (Choeronycteris mexicana) at historical sites in Arizona and New Mexico
The Mexican long-tongued bat (Choeronycteris mexicana) is a nectar-eating species that seasonally inhabits the southwestern United States. Since 1906, fewer than 1500 individuals of C. mexicana have been documented throughout the range of the species. We conducted a field survey in Arizona and New Mexico during summer 1999 to check historically occupied areas for recurrence of C...
Authors
P.M. Cryan, M.A. Bogan
Western crevice and cavity-roosting bats Western crevice and cavity-roosting bats
Among the 45 species of bats that occur in the United States (U.S.), 34 species regularly occur in western regions of the country. Many of these “western” species choose roost sites in crevices or cavities. Herein we provide an introduction to the biology of bats that roost in cavities and crevices and assess the challenges and opportunities associated with monitoring their populations...
Authors
Michael A. Bogan, Paul M. Cryan, Ernest W. Valdez, Laura E. Ellison, Thomas J. O’Shea
Non-USGS Publications**
Cryan, P.M. 1997. Distribution and roosting habits of bats in the southern Black Hills, South Dakota [M.S. Thesis]. Albuquerque, NM: University of New Mexico. 98 p.
Perry, T.W., P.M. Cryan, S.R. Davenport, and M.A. Bogan. 1997. New locality for Euderma maculatum (Chiroptera: vespertilionidae) in New Mexico. Southwestern Naturalist. 42(1): 99-10.
Bogan, M.A., T.J. O’Shea, P.M. Cryan, A.M. Ditto, W.H. Shaedla, and L. Ellison. 1996. Status and trends of bat populations at Los Alamos National Laboratory and Bandelier National Monument, Jemez Mountains, New Mexico. Annual report to Los Alamos National Laboratory and Bandelier National Monument. 1-18 p.
Cryan, P.M. and M.A. Bogan. 1995. Ecology and distribution of bats in the southern Black Hills: Annual report to cooperators. Annual report prepared for Jewel Cave National Monument, National Park Service, Custer, SD. 23 p.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.