The Fruit Bats of Colac

There’s a particular kind of noise that comes from the Colac Botanical Gardens (about 2 hours west of Melbourne in Australia) if you arrive at the right time of day. It's a layered, restless chatter that you might think in the first instance is birds. But if you Follow it to the end of the gardens you’ll find them: hundreds of grey-headed flying foxes draped across the treetops making one hell of a noise.