...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」
...Inthese instances well marked ecological differences exist between thesubspecies involved...
James S. Findley 「Speciation of the Wandering Shrew」
...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」
...In analyzing the ecological distribution within the forest, it is convenient to recognize five subdivisions (habitats); each is treated below as a unit...
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」
...—Rana nigromaculata is the most abundant ranid incentral Korea and, in a general way, the ecological equivalent ofRana pipiens in temperate North America...
Robert G Webb 「Some Reptiles and Amphibians from Korea」
...San Marcos, Guatemala) effort was madeto determine what, if any, ecological interspecific relationshipsexisted...
William E. Duellman 「A Review of the Middle American Tree Frogs of the Genus Ptychohyla」
...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」
...Furthermore, we have included ecological and distributional data inour synthesis of interspecific relationships...
William E. Duellman 「Middle American Frogs of the Hyla microcephala Group」
...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」
...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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