by Mike Krumboltz We saw this on Boing Boing and had to pass it along. A visitor at the Philadelphia Zoo captured footage of several penguins giving chase to a lone butterfly. Butterfly goes left, penguins waddle left. Butterfly goes right, penguins do their best to reverse course. We know the Internet is full of videos of cute kittens and playful puppies, but dang if this doesn't top 'em all. Check out the clip below.