Books in Biology (sorted by popularity)
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- On the Origin of Species By Means of Natural Selection Charles Darwin 3058 downloads
- Form and Function: A Contribution to the History of Animal Morphology E. S. Russell 2870 downloads
- The Origin of Species by Means of Natural Selection Charles Darwin 1221 downloads
- Darwinism (1889) Alfred Russel Wallace 1133 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 672 downloads
- Explanation of Terms Used in Entomology John Bernhard Smith 443 downloads
- Our Vanishing Wild Life: Its Extermination and Preservation William T. Hornaday 417 downloads
- The Foundations of the Origin of Species Charles Darwin 394 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 297 downloads
- An Elementary Study of Insects Leonard Haseman 290 downloads
- Social Life in the Insect World Jean-Henri Fabre 253 downloads
- Zoonomia; Or, the Laws of Organic Life, Vol. I Erasmus Darwin 241 downloads
- The History of Insects Unknown 226 downloads
- Birds of the Indian Hills Douglas Dewar 215 downloads
- The Life-Story of Insects George H. Carpenter 209 downloads
- On the Origin of Species Charles Darwin 204 downloads
- Our Common Insects A. S. Packard 197 downloads
- Wild Nature Won By Kindness Mrs. Brightwen 163 downloads
- The Human Side of Animals Royal Dixon 147 downloads
- The Wonders of Instinct: Chapters in the Psychology of Insects Jean-Henri Fabre 144 downloads
- Evolution in Modern Thought 140 downloads
- The Dawn of Reason; or, Mental Traits in the Lower Animals Jr. James Weir 135 downloads
- Lamarck, the Founder of Evolution: His Life and Work A. S. Packard 122 downloads
- Fathers of Biology Charles McRae 122 downloads
- On the Genesis of Species St. George Jackson Mivart 119 downloads
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