Wolverhampton scientists say new frog species sounds like a duck

Animal Quackers: Frog Noises in the Woods

Wallace, A. R. 1900. Studies scientific and social. London

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Scientists discover new species of 'music frog' in Arunachal - The Hindu

Phone Book of Wolverhampton.com +44 1902 - White Pages

Frogs Are Screaming But We Can't Hear Them

frog + duck = ?

Sound frog Berial おもちゃ・ホビー・グッズ

Animal Quackers: Frog Noises in the Woods