...Geographically cottonmouths differ somewhat in their ecological requirements, but are basically much alike in most respects... 
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...An ecological analysis of the interbreeding of Crested Titmice in Texas...
Emil K. Urban 「Birds from Coahuila, Mexico」
...Morphological and ecological differentiation of Peromyscus merriamifrom southern Arizona...
J. Knox Jones, Jr. 「Noteworthy Mammals from Sinaloa, Mexico」
...taylori may resultfrom each having occupied the same ecological niche in differentperiods...
Robert L. Packard 「Speciation and Evolution of the Pygmy Mice, Genus Baiomys」
...No ecological differences between this species and K...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...Now that the important ecological factors of the major environmentshave been outlined, we may examine the local distribution of amphibiansin each of these...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...The most striking ecological assemblage ofamphibians in the rainforest is the arboreal group of species...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...The secondpart of the study, now in preparation, deals with the ecological andhistorical geography of the herpetofauna...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...An ecological study of the narrow-mouthed toad (Microhyla) in northeastern Kansas...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
...Furthermore, we have included ecological and distributional data inour synthesis of interspecific relationships...
William E. Duellman 「Middle American Frogs of the Hyla microcephala Group」
...After geographical separation took place the initial genetic divergence between the two populations was maintained by means of ecological and ethological isolating mechanisms...
Juan R. León 「The Systematics of the Frogs of the Hyla Rubra Group in Middle America」
...An ecological study of the fishes of the Fall and Verdigris riversin Wilson and Montgomery counties, Kansas, March 1954, toFebruary 1955...
James Everett Deacon 「Fish Populations, Following a Drought, in the Neosho and Marais des Cygnes Rivers of Kansas」
...A preliminary survey and ecological study of the fishes of the SouthNinnescah and Spring Creek...
Artie L. Metcalf 「Fishes of Chautauqua, Cowley and Elk Counties, Kansas」
...An ecological study of the collared lizard (Crotaphytus collaris)...
Artie L. Metcalf 「Fishes of Chautauqua, Cowley and Elk Counties, Kansas」
...This is presumably attributable to the ecological barrier presented by the Wakarusa mainstream...
James E. Deacon 「Fishes of the Wakarusa River in Kansas」
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