Books in Biology (sorted by popularity)
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- On the Origin of Species By Means of Natural Selection Charles Darwin 3486 downloads
- Form and Function: A Contribution to the History of Animal Morphology E. S. Russell 2862 downloads
- The Origin of Species by Means of Natural Selection Charles Darwin 1348 downloads
- Darwinism (1889) Alfred Russel Wallace 1150 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 847 downloads
- Zoonomia; Or, the Laws of Organic Life, Vol. I Erasmus Darwin 531 downloads
- Explanation of Terms Used in Entomology John Bernhard Smith 503 downloads
- The Foundations of the Origin of Species Charles Darwin 491 downloads
- Our Vanishing Wild Life: Its Extermination and Preservation William T. Hornaday 435 downloads
- An Elementary Study of Insects Leonard Haseman 355 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 312 downloads
- Social Life in the Insect World Jean-Henri Fabre 310 downloads
- Birds of the Indian Hills Douglas Dewar 262 downloads
- The History of Insects Unknown 262 downloads
- Our Common Insects A. S. Packard 251 downloads
- On the Origin of Species Charles Darwin 245 downloads
- The Life-Story of Insects George H. Carpenter 237 downloads
- Wild Nature Won By Kindness Mrs. Brightwen 203 downloads
- The Dawn of Reason; or, Mental Traits in the Lower Animals Jr. James Weir 199 downloads
- Fathers of Biology Charles McRae 194 downloads
- What is Darwinism? Charles Hodge 170 downloads
- Evolution in Modern Thought 161 downloads
- The Variation of Animals and Plants under Domestication Charles Darwin 159 downloads
- The Wonders of Instinct: Chapters in the Psychology of Insects Jean-Henri Fabre 156 downloads
- The Human Side of Animals Royal Dixon 153 downloads
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