Did you know there's a bird that can dog knot zoo sex videossee ghosts? That gibbons love soup? Or that ducklings play a mean tune on the trombone?

The Los Angeles Zoo was a font of interesting factoids this week after prankster Jeff Wysaski, the man behind the Obvious Plant Tumblr and Facebook pages, left some completely true and not at all made up nuggets on signs across the grounds.

Visitors got the chance, briefly, to learn some very new things about owls, bears and meerkats.

Here are some of the best signs he placed in the zoo on Thursday.

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