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Frog Videos

This video (Part I) features the early breeding season of the foothill yellow-legged frog (Rana boylii) along small creeks in California. Males are establishing their territories and waiting for females. Males can be recognized with swollen and darkened thumb base. This frog has disappeared from an estimated 50 percent of its natural range. 2:38 minutes.
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This video (Part II) features female and male foothill yellow-legged frogs (Rana boylii) along small creeks in California. Learn how to differentiate females from males. Males develop nuptial swollen pads on thumb base during breeding season. 1:23 minutes.
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This video (Part III) features a young male foothill yellow-legged frogs protecting a small pool from being occupied by other males. You can also listen to the call of foothill-yellow legged frog. 1:55 minutes.
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Turtle Videos

The western pond turtle (Actinemys marmorata) is the only native freshwater turtle in northern Baja California , California , southern Oregon and Nevada .. This species occurs in ponds, streams, lakes, ditches, and marshes. The western pond turtle video features aerial and surface water basking of turtles including juveniles and adults.1:50 minutes.
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A large number of western pond turtles gather close to the shoreline of a pond in California to feed on microscopic phytoplankton and zooplankton. This rare turtle feeding behavior was captured for the first time on video by ESI, now you can view it here!

Other ESI field videos can be viewed at:


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