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January 29, 2014 AT 1:01 PM
Bird species that fly in a V-formation do so to conserve energy, according to scientists in the UK. In experiments with free-flying birds, researchers at the Royal Veterinary College in London have answered a centuries-old question by demonstrating that birds like the Northern Ibis create a slipstream for their flock-mates to follow, thereby making flight more efficient. Jim Drury has more.