Books in Biology (sorted by popularity)
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Birds in Town & Village W. H. Hudson 300 downloads
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Birds of the Indian Hills Douglas Dewar 297 downloads
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Darwinism (1889) Alfred Russel Wallace 297 downloads
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The Story of the Living Machine H. W. Conn 282 downloads
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Ducks at a Distance: A Waterfowl Identification Guide Bob Hines 279 downloads
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Concerning Animals and Other Matters Edward Hamilton Aitken 270 downloads
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Text Book of Biology, Part 1: Vertebrata H. G. Wells 269 downloads
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Darwin, and After Darwin, Volumes 1 and 3 George John Romanes 265 downloads
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American Addresses, with a Lecture on the Study of Biology Thomas Henry Huxley 263 downloads
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Evolution in Modern Thought 259 downloads
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The History of Insects Unknown 258 downloads
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On the Origin of Species Charles Darwin 257 downloads
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Wild Nature Won By Kindness Mrs. Brightwen 257 downloads
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Fathers of Biology Charles McRae 241 downloads
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Our Common Insects A. S. Packard 233 downloads
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De l'origine des espèces (French) Charles Darwin 228 downloads
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Essays on early ornithology and kindred subjects James Roxburgh McClymont 225 downloads
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"Wee Tim'rous Beasties": Studies of Animal life and Character Douglas English 222 downloads
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Catalogue of British Columbia Birds Francis Kermode 221 downloads
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Synopsis of Some Genera of the Large Pyrenomycetes C. G. Lloyd 216 downloads
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Contributions to the Theory of Natural Selection Alfred Russel Wallace 216 downloads
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Parasiten der Honigbiene (German) Eduard Philibert Assmuss 215 downloads
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Development of the Digestive Canal of the American Alligator A. M. Reese 212 downloads
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A Critical Examination of the Position of Mr. Darwin's Work, "On the Origin of Species," in Relation to the Complete Theory of the Causes of the Phenomena of Organic Nature Thomas Henry Huxley 210 downloads
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The Evolution of Man Scientifically Disproved in 50 Arguments William A. Williams 206 downloads