Books in Biology (sorted by popularity)
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- On the Origin of Species By Means of Natural Selection Charles Darwin 7219 downloads
- The Origin of Species by Means of Natural Selection Charles Darwin 1846 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 741 downloads
- Explanation of Terms Used in Entomology John Bernhard Smith 500 downloads
- Our Vanishing Wild Life: Its Extermination and Preservation William T. Hornaday 400 downloads
- An Elementary Study of Insects Leonard Haseman 376 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 367 downloads
- Zoonomia; Or, the Laws of Organic Life, Vol. I Erasmus Darwin 349 downloads
- Social Life in the Insect World Jean-Henri Fabre 258 downloads
- My Studio Neighbors W. Hamilton Gibson 222 downloads
- The Story of the Living Machine H. W. Conn 202 downloads
- Anecdotes of the Habits and Instinct of Animals Mrs. R. Lee 202 downloads
- On the Origin of Species Charles Darwin 197 downloads
- The Human Side of Animals Royal Dixon 193 downloads
- Darwinism (1889) Alfred Russel Wallace 187 downloads
- The Life-Story of Insects George H. Carpenter 183 downloads
- Wild Nature Won By Kindness Mrs. Brightwen 180 downloads
- Birds of the Indian Hills Douglas Dewar 178 downloads
- The Variation of Animals and Plants under Domestication Charles Darwin 177 downloads
- Birds in Town & Village W. H. Hudson 177 downloads
- What is Darwinism? Charles Hodge 176 downloads
- Evolution, Old & New Samuel Butler 166 downloads
- Form and Function: A Contribution to the History of Animal Morphology E. S. Russell 164 downloads
- Ducks at a Distance: A Waterfowl Identification Guide Bob Hines 164 downloads
- The Wonders of Instinct: Chapters in the Psychology of Insects Jean-Henri Fabre 163 downloads
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