...At length, escaping from greedy rulers, hostile populations, wild beasts, swamps, rains and fevers, he at length reached Bundi, near Kouka, on the 30th of November... 
W.H.G. Kingston 「Great African Travellers」
...Mortality rate at birth is high in captive individuals but has not been determined in natural populations...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Most specimens of a population of sirtalis occurring in New Mexicoare recognizably different from most specimens of other populations...
Henry S. Fitch 「Occurrence of the Garter Snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains」
...Like most widely ranging subspecies, parietalis and fitchi varygeographically and local populations often are noticeably differentfrom typical material...
Henry S. Fitch 「Occurrence of the Garter Snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains」
...Knowledge of the home range is of value to man when control or propagation of cottontail populations is desired...
Donald W. Janes 「Home Range and Movements of the Eastern Cottontail in Kansas」
...The datapresented here possibly are the results of inadequate sampling, but more likelyreflect actual differences in the populations...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...The fact that pocket gophers from the Tamaulipan barrier islandoccupy a position geographically intermediate between presentTexan populations and the isolated population in southern Tamaulipas(G...
Robert K Selander 「Vertebrates from the Barrier Island of Tamaulipas, México」
...Major results of this include isolation of certain populations and absence of others in the boreal islands...
Emil K. Urban 「Birds from Coahuila, Mexico」
...Miller, Friedmann, Griscom, and Moore (1957:376) recorded intermediate populations of the Rufous-crowned Sparrow from 12 mi...
Emil K. Urban 「Birds from Coahuila, Mexico」
...The work by Miller (1960:518) with three populations of theWhite-crowned Sparrow, revealing innately different responses tovernal photoperiodic increase, is especially important in this regard...
Richard F. Johnston 「The Breeding Birds of Kansas」
...cryptus Oberholser is found south of stations in Greeley,Stafford, and Linn counties; a zone of intergradation occurs betweenthe two named populations...
Richard F. Johnston 「The Breeding Birds of Kansas」
...longicauda Baird occurs west of stations inDecatur, Lane, and Meade counties; the intervening populations are ofintermediate morphologic character...
Richard F. Johnston 「The Breeding Birds of Kansas」
...This is evidence of meaningful adaptation of the NorthAmerican populations to environments in which they now live, andcontinued use of P...
Richard F. Johnston 「The Breeding Birds of Kansas」
...A later work by Rand(1943) considered the northwestern populations of M...
Rollin H. Baker 「Mammals taken Along the Alaska Highway」
...luteus,which occurs to the east and southeast), even though adults averagesomewhat paler than adults of typical populations of that subspecies...
Kenneth W. Andersen 「Mammals of Northwestern South Dakota」
...During the winter there is some interchange of populations betweenBanks and Victoria islands across the frozen Prince of Wales Strait(Armstrong, 1857: 297, 336)...
Francis Harper 「The Barren Ground Caribou of Keewatin」
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ivories viceroy alimentary
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