The Narwhal's Left Tooth: Beware: Frogs, salamanders on the move

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Ancient amphibians had mouthful of teeth

Hinterland Who's Who - Chorus Frogs

The enigmatic narwhal

What are the weirdest animals ever? - Quora

Relicts in the mist: Two new frog families, genera and species

The Wild Frogs, Newts and Salamanders That Have Eluded Cameras for

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The Wild Frogs, Newts and Salamanders That Have Eluded Cameras for

What are some examples of animals with funny and unusual features

Narwhal has the strangest tooth in the sea

Phylogenetic Systematics of Dart-Poison Frogs and Their Relatives

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Poison Dart Frog Color and Protection