'Horror frog' breaks own bones to produce claws

[andresont]

"Amphibian horror" isn't a movie genre, but on this evidence perhaps it should be. Harvard biologists have described a bizarre, hairy frog with cat-like extendable claws.

Trichobatrachus robustus actively breaks its own bones to produce claws that puncture their way out of the frog's toe pads, probably when it is threatened.
http://www.newscientist.com/article/...2_head_dn13991
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