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If you've ever had a kea nibble your car tyre or seen the mountain parrot move a traffic cone for no earthly reason, you'd know — these cheeky birds do things just because they want to.
Living in New Zealand's southern alps, keas have been seen rumbling around like kittens, looping in the sky, and did we mention they like to mess with traffic? A new study suggests that one particular call — its warble — also seems to spread an infectious desire to play.
Much like you might chuckle along with a sitcom laugh track, the kea's warble can make other kea extra rambunctious.
SEE ALSO: What would animals say if tech let them talk? Nothing good, probably. Read more...More about Science, Parrots, Australia, New Zealand, and Keas