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Presidio of San Francisco Cavalry barracks, built 1902
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Presidio of San Francisco
Bullfrog
North American Bullfrog
© Twan Leenders, 2003
A North American Bullfrog similar to what might be found at the Presidio.
 

Natural History: The Bullfrog is an introduced species in the Presidio and is detrimental to native species.

General Distribution: This species can be found in ponds and streams and has been sighted at Mountain Lake.

Frequency: The Bullfrog is uncommon within the Presidio.

Identifying Characteristics: This is a large frog (9 - 20 cm). It has an olive, green, or brown body with dark bands on its legs. Its underside is a white-gray. It has a conspicuous eardrum with a fold of skin above.

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The Presidio Forest

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The Presidio occupies 1,491 acres in northern San Francisco and welcomes over five million visitors annually.
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Last Updated: June 30, 2007 at 13:00 MST