Large bat colony drives National Weather Service’s radar batty

It's not Halloween yet, but that hasn't stopped a large colony of bats from invading the colony National Weather Service radar. A cauldron of bats - the creative catchphrase for a group of bats - appeared in Phoenix, Arizona on September 13th.

Meteorologists first thought the large flock of bats might be rain clouds. But it soon turned out that those clouds were actually Mexican bats flying en masse. The NWS tweeted an impressive animated GIF of bat madness:

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