...The depths to which cottonmouths penetrate into their dens may have a limiting influence upon the geographic range, especially in the northern extremes... 
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Comments on the taxonomy and geographic distribution of some North American rabbits...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...The maps herewith and listings of marginal localities are themeans chosen to present the information on geographic distribution...
E. Raymond Hall 「A Synopsis of the North American Lagomorpha」
...Despitethis fault of the key to the lagomorphs, it, and the accompanyingaccount, I hope, will aid workers who need to identify kinds oflagomorphs and to know about their geographic distribution...
E. Raymond Hall 「A Synopsis of the North American Lagomorpha」
...The lackof white on the underside of the tail is a ready means of distinguishingthis species from the other species of the genus which occurwithin its geographic range...
E. Raymond Hall 「A Synopsis of the North American Lagomorpha」
...Comments on the taxonomy and geographic distribution of someNorth American rabbits...
E. Raymond Hall 「A Synopsis of the North American Lagomorpha」
...10,240, from mouth of Birch Creek, Deep Creek Mountains,Juab County, extends the known geographic range 50 miles eastfrom Cherry Creek Canyon, Nevada (see Hall, 1946:241)...
Stephen D. Durrant 「Additional Records and Extensions of Known Ranges of Mammals from Utah」
...Little geographic variation in color or pattern is evident...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Superimposed on this geographic variation are ontogenetic changes, whichare most noticeable in males...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...baudini, which has a broad geographic range, including a variety of habitats...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...Variations of this kind are spoken of as geographic, racial, or subspecificand the birds exhibiting them are termed subspecies...
Frank M. Chapman 「Color Key to North American Birds」
...Some mammals that passed throughTamaulipas into Texas have extended their geographic ranges far northof Texas...
Ticul Alvarez 「The Recent Mammals of Tamaulipas, Mexico」
...They include the northern part ofTamaulipas in the geographic range of T...
Ticul Alvarez 「The Recent Mammals of Tamaulipas, Mexico」
...A geographic classification of Neotropical mammals...
Ticul Alvarez 「The Recent Mammals of Tamaulipas, Mexico」
...The geographic races ofHedymeles melanocephalusSwainson...
Emil K. Urban 「Birds from Coahuila, Mexico」
...National Geographic Magazine, vol...
Edith M. Patch 「Bird Stories」
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scenting savoury Smoaks
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