Meet the moths that use the stars to find their way
TWICE A YEAR the skies of south-eastern Australia fill with billions of Bogong moths. In the spring these unassuming brown critters, about an inch long, fly south from their birthplace in Queensland or New South Wales to the Australian Alps where they enter a months-long hibernation-like state in the cool mountain caves. In the autumn, they fly the 1,000km-long return leg to breed.
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