A new paper about the reproductive behaviour of the spiny anteater, to be published in the December issue of American Naturalist, makes for fascinating - if slightly disturbing - reading.
The spiny anteater (Tachyglossuss aculeatus) is a primitive mammal with an unusual four-headed penis. The animal is difficult to observe in the wild, and does not readily copulate when in captivity, so exactly how the male uses its penis was a mystery.
(NSFW - video contains the word, "penis" and has pictures thereof.)
Damn, it looks like something from the movie, "Alien."
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