Books in Biology (sorted by popularity)
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- On the Origin of Species By Means of Natural Selection Charles Darwin 2932 downloads
- The Origin of Species by Means of Natural Selection Charles Darwin 1273 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 598 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 509 downloads
- Social Life in the Insect World Jean-Henri Fabre 406 downloads
- Explanation of Terms Used in Entomology John Bernhard Smith 356 downloads
- An Elementary Study of Insects Leonard Haseman 352 downloads
- The History of Insects Unknown 314 downloads
- Zoonomia; Or, the Laws of Organic Life, Vol. I Erasmus Darwin 305 downloads
- Our Vanishing Wild Life: Its Extermination and Preservation William T. Hornaday 297 downloads
- Birds of the Indian Hills Douglas Dewar 292 downloads
- On the Genesis of Species St. George Jackson Mivart 271 downloads
- Wild Nature Won By Kindness Mrs. Brightwen 269 downloads
- Anecdotes of the Habits and Instinct of Animals Mrs. R. Lee 247 downloads
- Darwinism (1889) Alfred Russel Wallace 232 downloads
- Life History of the Kangaroo Rat Charles Taylor Vorhies and Walter P. Taylor 232 downloads
- What is Darwinism? Charles Hodge 216 downloads
- The Evolution of Man Scientifically Disproved in 50 Arguments William A. Williams 212 downloads
- The Variation of Animals and Plants under Domestication Charles Darwin 199 downloads
- The Dawn of Reason; or, Mental Traits in the Lower Animals Jr. James Weir 196 downloads
- Birds in Town & Village W. H. Hudson 190 downloads
- The Wonders of Instinct: Chapters in the Psychology of Insects Jean-Henri Fabre 184 downloads
- Our Common Insects A. S. Packard 181 downloads
- Lamarck, the Founder of Evolution: His Life and Work A. S. Packard 175 downloads
- Form and Function: A Contribution to the History of Animal Morphology E. S. Russell 171 downloads
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