...An ecological analysis of the interbreeding of Crested Titmice in Texas... 
Emil K. Urban 「Birds from Coahuila, Mexico」
...An ecological study of the collared lizard (Crotaphytus collaris)...
Harrison B Tordoff 「Check-list of the Birds of Kansas」
...The ecological requirements of jumping mice, genus Zapus, andthe subspecies of Sorex vagrans that dwell in hydroseres are essentiallysimilar...
James S. Findley 「Speciation of the Wandering Shrew」
...Obviously, the diversity of ecological niches in the rainforest is sufficient to support a variety of related species...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...Etheridge, we again crossed theisthmus several times in order to gather ecological data in the wetseason, and studied especially hylid frogs, most of which had not beenseen in the dry season...
William E. Duellman 「A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico」
...On theother hand, the savannas and scrub forests are characterized by extremeconditions of desiccation, a factor of considerable importance inlimiting the ecological distribution of amphibians...
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」
...The ecological relationships that exist between the two species in theCordillera Volcánica are not known...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...Sufficient ecological data to determine differences inhabitat between the two species have not been compiled...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...The limited ecological data suggest that thespecies inhabits the transition zone between the tropical scrub forestand the temperate hardwood forest...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...Specimens of this lizard have been collectedinfrequently; the few locality records and limited ecological dataindicate that it inhabits dense scrub forest and tropical semi-deciduousforest...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...The present ecological study has demonstratedthat T...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...Similar ecological relationships were observed for several species ofCosta Rican hylids...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...Bragg (1943: 76) emphasized that in Oklahoma itis widely distributed over the state, occupying a variety of habitats,with little ecological restriction...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
...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」
...Under these circumstances it can be supposed that the different ecological preferences ofelaeochroaandstaufferidepend on the climatic changes that took place during the Pleistocene...
Juan R. León 「The Systematics of the Frogs of the Hyla Rubra Group in Middle America」
...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」
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