Books in Animal (sorted by popularity)
- The Argus Pheasant John Charles Beecham 226 downloads
- A Review of the Middle American Tree Frogs of the Genus Ptychohyla William Edward Duellman 211 downloads
- Ducks and Geese Harry M. Lamon and Rob R. Slocum 210 downloads
- The Woodpeckers Fannie Hardy Eckstorm 198 downloads
- Birds, Illustrated by Color Photography, Vol. 1, No. 2 Various 197 downloads
- Wild Animals at Home Ernest Thompson Seton 196 downloads
- Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia) Ray D. Burkett 195 downloads
- Butterflies and Moths (British) William S. Furneaux 190 downloads
- Birds, Illustrated by Color Photography, Vol. 2, No. 2 Various 186 downloads
- Zoological Illustrations, Volume 1 William Swainson 185 downloads
- Antarctic Penguins: A Study of Their Social Habits G. Murray Levick 183 downloads
- Game Birds and Game Fishes of the Pacific Coast Harry Thom Payne 180 downloads
- Sketches of the Natural History of Ceylon Sir James Emerson Tennent 176 downloads
- Birds Every Child Should Know Neltje Blanchan 173 downloads
- In New England Fields and Woods Rowland Evans Robinson 165 downloads
- Comparative Ecology of Pinyon Mice and Deer Mice in Mesa Verde National Park, Colorado Charles L. Douglas 163 downloads
- What Bird is That? Frank M. Chapman 163 downloads
- Butterflies Worth Knowing Clarence Moores Weed 162 downloads
- Wolf and Coyote Trapping: An Up-to-Date Wolf Hunter's Guide A. R. Harding 160 downloads
- Illustrative Anecdotes of the Animal Kingdom Samuel G. Goodrich 160 downloads
- Birds from North Borneo Max C. Thompson 154 downloads
- Color Key to North American Birds Frank M. Chapman 152 downloads
- Hunting in Many Lands: The Book of the Boone and Crockett Club 151 downloads
- An Australian Bird Book: A Pocket Book for Field Use John Albert Leach 150 downloads
- Natural History in Anecdote 149 downloads