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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 6158
California condor, Gymnogyps californianus (Shaw) California condor, Gymnogyps californianus (Shaw)
No abstract available.
Authors
N.F.R. Snyder
Can relocated wolves survive? Can relocated wolves survive?
No abstract available.
Authors
S. H. Fritts, W.J. Paul, L.D. Mech
Coastal dune communities Coastal dune communities
No abstract available.
Authors
William L. Halvorson, R. E. Koske
Colonial waterbird management: a synopsis Colonial waterbird management: a synopsis
No abstract available.
Authors
R.M. Erwin
Comparisons of winter bird populations in extensive neotropical forest and in isolated fragments Comparisons of winter bird populations in extensive neotropical forest and in isolated fragments
No abstract available.
Authors
C.S. Robbins, B.A. Dowell, D.K. Dawson, R. Coates-Estrada, J. Colon, F. Espinoza, J. Rodriguez, R. Sutton, T. Vargas, Dieter Weyer
Crested caracara Crested caracara
The crested caracara's range extends from the southern United States south to Tierra del Fuego. Although the caracara has been recorded in all of the southwestern states, it occurs regularly only in southern Arizona and central, southern and coastal Texas. Its distribution is closely linked to the availability of carrion. Throughout its range, thecaracara is associated with open habitats...
Authors
D. H. Ellis, D.G. Smith, W.H. Whaley, Catherine H. Ellis
Dabbling duck harvest dynamics in the Central Valley of California--implications for recruitment Dabbling duck harvest dynamics in the Central Valley of California--implications for recruitment
Age and sex ratios and body weights were obtained for northern pintails (Anas acuta), mallards (A. platyrhynchos), American wigeon (A. americana), green-winged teal (A. crecca), and northern shovelers (A. clypeata) shot at Mendota State Wildlife Area in the San Joaquin Valley (SANJV) and at Sacramento National Wildlife Refuge in the Sacramento Valley (SACV) during 1982-83 and 1983-84...
Authors
M. R. Miller, J. Beam, D.P. Connelly
Distribution and numbers of American black ducks along the Maine coast during the severe winter of 1980-1981 Distribution and numbers of American black ducks along the Maine coast during the severe winter of 1980-1981
No abstract available.
Authors
J. R. Longcore, J.P. Gibbs
Distribution and status of the peregrine falcon in South America Distribution and status of the peregrine falcon in South America
No abstract available.
Authors
J.W. McNutt, D. H. Ellis, C.P. Garat, T.B. Roundy, W.G. Vasina, C.M. White