...An ecological survey of reptiles in parts of northwestern Texas... 
Henry S. Fitch 「Occurrence of the Garter Snake, Thamnophis sirtalis, in the Great Plains and Rocky Mountains」
...An ecological analysis of the interbreeding of Crested Titmice in Texas...
Emil K. Urban 「Birds from Coahuila, Mexico」
...Because its unique geographical location and ecological setting supports a rich and varied avifauna, the Yucatán Peninsula has received considerable attention by ornithologists...
Erwin E. Klaas 「Summer Birds From the Yucatan Peninsula」
...An ecological study of the collared lizard (Crotaphytus collaris)...
Harrison B Tordoff 「Check-list of the Birds of Kansas」
...Grinnell (1933:54) characterizes the ecological nicheof the race pallidus as being "open, sandy ground, often ...
Terry A. Vaughan 「Mammals of the San Gabriel Mountains of California」
...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」
...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」
...—In this habitat the third dimension (height) of the rainforest probably is the most complex insofar as the inter-relationships of species and ecological niches are concerned...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...No ecological differences between this species and K...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...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 mean body temperature for active individuals ()is probably somewhat below the ecological optimum, because afew temperatures were abnormally low...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...The present ecological study has demonstratedthat T...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...If this ecological segregation resulted from intraspecificcompetition in a stock of Ptychohyla, possibly P...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...Furthermore, we have included ecological and distributional data inour synthesis of interspecific relationships...
William E. Duellman 「Middle American Frogs of the Hyla microcephala Group」
...An ecological study of the collared lizard (Crotaphytus collaris)...
Artie L. Metcalf 「Fishes of Chautauqua, Cowley and Elk Counties, Kansas」
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