Uranium-series dating of bone from the Isimila prehistoric site, Tanzania
F.C. Howell, G.H. Cole, M.R. Kleindienst, Barney J. Szabo, K.P. Oakley
1972, Nature (237) 51-52
EXCAVATIONS in 1957 and 1958 at the Isimila prehistoric site, in Tanzania1, sampled Acheulian occurrences in horizons at various levels in the Isimila Beds which are approximately 18 m thick. No significant breaks were observed in the sedimentary sequence, although there are numerous local hiatuses....
Subduction zones: Not relevant to present-day problems of waste disposal
E. A. Silver
1972, Nature (239) 330-331
SUBDUCTION zones are considered to be sites of disposal for vast areas of the Earth's surface1, while new surface is generated simultaneously at rise crests2. Bostrom and Sherif3 suggest that the world's industrial and domestic waste be dumped into subduction zones at deep sea trenches to allow...
The season--April, May, June, 1972
C.S. Robbins
1972, Maryland Birdlife (28) 105-117
Eggshell Thinning and DDE (Reply)
Stanley N. Wiemeyer, Richard D. Porter
1972, Nature (240) 163-163
No abstract available....
Current status of the endangered masked bobwhite quail
R. E. Tomlinson
1972, Transactions of the North American Wildlife and Natural Resources Conference (37) 294-311
National survey of blackbird-starling roosts
J.S. Webb, W.C. Royall
1972, Proceedings of the Bird Control Seminar (5) 134-135
The seventy-second Christmas bird count. 296. Ocean City, Md
C.S. Robbins
1972, American Birds (26) 261-262
Distribution and numbers of the California condor, 1966-1971
S.R. Wilbur, W.D. Carrier, J.C. Borneman, R.D. Mallette
1972, American Birds (26) 819-823
Endangered birds in Hawaii
W. Banko
1972, 'Elepaio (33) 11-13
No abstract available....
Territorial male red-winged blackbird distribution in Wood County, Ohio
M.I. Dyer
1972, Proceedings of the Bird Control Seminar (5) 185-194
California condor survey, 1971
W.D. Carrier, R.D. Mallette, S. Wilbur, J.C. Borneman
1972, California Fish and Game (58) 327-328
Copulation by California condors
S.R. Wilbur, J.C. Borneman
1972, The Auk (89) 444-445
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...
Sampling of corn to assess bird damage
P. Granett, J. T. Linehan
1972, Proceedings of the Bird Control Seminar (5) 195-199
A new species of warbler (Parulidae) from Puerto Rico
C. B. Kepler, K.C. Parkes
1972, The Auk (89) 1-18
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...
The seventy-second Christmas bird count. 319. Little Creek, Va
P. Sykes Jr.
1972, American Birds (26) 272-273
Thirty-sixth breeding-bird census
W.T. Van Velzen
1972, American Birds (26) 937-940
Pesticide mortality of young white-faced ibis in Texas
Edward L. Flickinger, D. L. Meeker
1972, Bulletin of Environmental Contamination and Toxicology (8) 165-168
The combination of the symptoms observed in sick and dying birds and the high brain residues in the three birds collected dying, as well as in two of the four collected dead, implicate dieldrin as at least one of the causes of mortality of young ibis at the Lavaca Bay...
California condor survey, 1970
R.D. Mallette, S.R. Wilbur, W.D. Carrier, J.C. Borneman
1972, California Fish and Game (58) 67-68
Recoveries of royal terns banded in Virginia. Part I. The Caribbean
W.T. Van Velzen, R.D. Benedict
1972, Raven (43) 39-41
No abstract available....
25th winter bird-population study. 8. Hickory-oak-ash floodplain forest
C.S. Robbins
1972, American Birds (26) 664-665
The season--October, November, December, 1971
C.S. Robbins
1972, Maryland Birdlife (28) 29-39
The season--July, August, September, 1972
C.S. Robbins
1972, Maryland Birdlife (28) 150-158
25th winter bird-population study. 9. Upland tulip-tree--maple--oak forest
C.S. Robbins
1972, American Birds (26) 665
Ethyl Mercury p-Toluene Sulfonanilide: Lethal and Reproductive Effects on Pheasants
J. W. Spann, R.G. Heath, J.F. Kreitzer, L. N. Locke
1972, Science (175) 328-331
Ethyl mercury p-toluene sulfonanilide (active ingredient of Ceresan M) at a dietary concentration of 30 parts per million (12.5 parts of mercury per million) was lethal to adult ring-necked pheasants. Egg production and survival of third-week embryos were sharply reduced when breeders were maintained on feed containing 10...
New birds in Delaware
J. T. Linehan
1972, Delaware Conservationist (15) 15-16
