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Vetstreet: 20 Animals You Might Not Know Are Going Extinct

Snakes

Garden-variety garter snakes are very common, but in California one subspecies has been listed as endangered since 1969. Pollution, urban development and pet-trade capture are thought to be causes of population decline over the past century.

(Credit: Thinkstock)

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The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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