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California - San Francisco Garter Snake
http://library.thinkquest.org/2878/ca_san_francisco_garter_snake.html
Environmental Impact on Endangered Animals - San Francisco Garter Snake (Thamnophis Sirtalis Tetrataenia).
The Manzanita Project
http://www.calacademy.org/research/library/manzanita/html/selected.htm
Selected images of locally endangered species.