Publications
This list of publications includes peer-review journal articles, official USGS publications series, reports and more authored by scientists in the Ecosystems Mission Area. A database of all USGS publications, with advanced search features, can be accessed at the USGS Publications Warehouse.
Filter Total Items: 41763
Copulation by California condors
Koford (Res. Rept. No. 3, Natl. Audubon Soc., 1953) observed sexual display among California Condors (Gymnogyps californianus) on more than 30 occasions, yet only once did he see what he thought was copulation. Some of the displays he watched were quite intricate, with considerable posturing and "male" aggression, but no such activity preceded this copulation. The birds sat several feet apart for
Authors
S.R. Wilbur, J.C. Borneman
A new species of warbler (Parulidae) from Puerto Rico
The West Indies are among the best known of the world's tropical regions, and our knowledge of the distribution of indigenous land birds in the Greater Antilles has been thought to be nearly complete (Bond, 1956). The last new species from the Antilles were described in 1927, the results of work in the Zapata Swamp of Cuba (Barbour and Peters, 1927) and the isolated Morne de la Selle in Haiti (We
Authors
C.B. Kepler, K.C. Parkes
Distribution and numbers of the California condor, 1966-1971
No abstract available.
Authors
S.R. Wilbur, W.D. Carrier, J.C. Borneman, R.D. Mallette
[letter to the editor] Eggshell thinning and DDE
No abstract available.
Authors
Stanley N. Wiemeyer, Ron Porter
Notes on the ecology of Puerto Rican swifts, including the first record of the white-collared swift Streptoprocne zonaris
No abstract available.
Authors
C.B. Kepler
[Book review] Veterinary Clinical Pathology by Margaret W. Sloss. Iowa State University Press, 4th ed., 1970
No abstract available.
Authors
L. N. Locke
Territorial male red-winged blackbird distribution in Wood County, Ohio
No abstract available.
Authors
M.I. Dyer
Eastward migration of blue-winged teal
Of 3,789 recoveries of blue-winged teal (Anas discors) banded prior to the hunting season in the prairie pothole region, 183 (4.8 percent) were recovered, due east in New England, Ontario, Quebec, and the Maritime Provinces during the subsequent hunting season. Of 19 recoveries looked at in detail, all were banded as either hatching-year (flying young) or local (flightless young) birds. A blue-w
Authors
B. Sharp
The seventy-second Christmas bird count. 319. Little Creek, Va
No abstract available.
Authors
P. Sykes