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Page 6207, results 155151 - 155175

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Organochlorines, heavy metals, and the biology of North American accipiters
N.F.R. Snyder, Hollice A. Snyder, J.L. Lincer, R.T. Reynolds
1973, BioScience (23) 300-305
Analyses of eggs of three species of North American accipitrine hawks for organochlorines and heavy metals indicate that contamination with DDE may be the primary cause of recent population declines of two of the species, Cooper's hawk and sharp-shinned hawk....
Pesticide residues in eggs of wild birds: Adjustment for loss of moisture and lipid
L.F. Stickel, Stanley N. Wiemeyer, L. J. Blus
1973, Bulletin of Environmental Contamination and Toxicology (9) 193-196
Eggs of wild birds collected for the purpose of measuring concentrations of pesticides or other pollutants vary from nearly fresh to nearly dry so that objective comparisons cannot be made on the basis of weight of the contents at the time of collection. Residue concentrations in the nearly dry...
Sea birds wintering off Maryland shores, 1972-73
R.A. Rowlett
1973, Maryland Birdlife (29) 88-102
During the winter of 1972-73, studies were conducted to determine the status and distribution of pelagic species of birds occurring at sea as far as 38 miles east of Ocean City, Md. The wintering off-shore avifauna was found to be impressively rich in variety of species and numbers of...
The California condor in the Pacific Northwest
S.R. Wilbur
1973, The Auk (90) 196-198
The California Condor (Gymnogyps californianus), once found along the Pacific Coast from Baja California to British Columbia, had become very rare north of California by 1850. Koford (1953), summarizing information available on the species in the Pacific Northwest, tentatively concluded that birds seen in that area were wanderers from California,...
Distribution of two western clapper rail races as determined by responses to taped calls
R. E. Tomlinson, R.L. Todd
1973, Condor (75) 177-183
During 1969 and 1970, surveys of the endangered Yuma Clapper Rail were conducted using taped calls to elicit responses from the birds. During the two summers, more than 158 Yuma clappers were located in cattailtule marshes along the Colorado River south of Needles, California, to the International Boundary, a distance...
Molt patterns and weight changes of the American woodcock
Ray B. Owen, W.B. Krohn
1973, The Wilson Bulletin (85) 31-41
A study of molt and changes in body weight of American Woodcock was conducted to better understand the summer and fall behavior of these birds and to indicate periods of physiological stress. The postnuptial molt of adults was a complete molt beginning in late June and ending by the middle...