- Museum of Vertebrate Zoology - http://elib.cs.berkeley.edu/mvz/
Provides specimen data and archival materials from the collections of the University of California, Berkeley.
- Infrared Zoo - http://coolcosmos.ipac.caltech.edu/image_galleries/ir_zoo/index.html
Uses infrared photography to show the differences between warm and cold blooded animals.
- Will's Skull Page - http://www.skullsite.co.uk/
Features images and measurements of mammalian skulls as well as updates and related links.
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