Green treefrog
Hyla cinerea
Green treefrogs in amplexus. Source: Kim Hunter (2014)
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Túngara frog
Physalaemus pustulosus
Male túngara frog calling. Note the inflating vocal sac and (blurry) radiating ripples. Source: Ryan Taylor (2014)
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Spring peeper
Pseudacris crucifer
Male spring peeper calling. Source: Ryan Taylor (2014)
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