Books in Biology (sorted by popularity)
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- On the Origin of Species By Means of Natural Selection Charles Darwin 2977 downloads
- Form and Function: A Contribution to the History of Animal Morphology E. S. Russell 2842 downloads
- The Origin of Species by Means of Natural Selection Charles Darwin 1217 downloads
- Darwinism (1889) Alfred Russel Wallace 1113 downloads
- Our Vanishing Wild Life: Its Extermination and Preservation William T. Hornaday 418 downloads
- Explanation of Terms Used in Entomology John Bernhard Smith 395 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 391 downloads
- On the Origin of Species by Means of Natural Selection Charles Darwin 310 downloads
- The Foundations of the Origin of Species Charles Darwin 307 downloads
- An Elementary Study of Insects Leonard Haseman 273 downloads
- The History of Insects Unknown 250 downloads
- Social Life in the Insect World Jean-Henri Fabre 228 downloads
- Zoonomia; Or, the Laws of Organic Life, Vol. I Erasmus Darwin 209 downloads
- Birds of the Indian Hills Douglas Dewar 208 downloads
- The Life-Story of Insects George H. Carpenter 186 downloads
- Our Common Insects A. S. Packard 179 downloads
- On the Origin of Species Charles Darwin 172 downloads
- Wild Nature Won By Kindness Mrs. Brightwen 158 downloads
- The Human Side of Animals Royal Dixon 140 downloads
- The Wonders of Instinct: Chapters in the Psychology of Insects Jean-Henri Fabre 129 downloads
- Fathers of Biology Charles McRae 116 downloads
- Birds in Town & Village W. H. Hudson 114 downloads
- Lamarck, the Founder of Evolution: His Life and Work A. S. Packard 114 downloads
- Evolution in Modern Thought 111 downloads
- The Variation of Animals and Plants under Domestication Charles Darwin 111 downloads
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