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Bornean Tree-hole Frog (Metaphrynella sundana) ♂ | by cclborneo
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Bornean Tree-hole Frog (Metaphrynella sundana) ♂

A male Bornean Tree-hole Frog (Metaphrynella sundana) calls for a mate from its lair. These frogs are able to modify the pitch of their call to match the resonating frequency of the tree-hole chamber, thereby amplifying their volume. Sarawak, Malaysia (Borneo).

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Taken on September 1, 2008