Caribou Huddle Together To Avoid Insects

Humans are not the only creatures bothered by mosquitoes and flies. They harassed caribou so much that earlier this month, about 300,000 of the animals huddled closely together in Northwest Alaska to avoid being bitten and parasitized. It's one of the most spectacular gatherings of wildlife in the world, rivaling the migratory herds of Africa's Serengeti, said Kyle Joly, a wildlife biologist with the National Park Service based in Fairbanks, Alaska.

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