Why birds fly in V-shaped flocks, bald ibis study

Dear Kitty. Some blog

This is a video, in Italian, about bald ibises in Austria.

From Science:

A bit of altruism makes V-shaped flocks of birds possible

By Virginia Morell

2 February 2015 3:00 pm

It seems like a job no bird would want. The leader of a V-shaped flock works the hardest, fighting strong air currents while others save energy by traveling in his wake. So why would any bird volunteer to be in front? From an evolutionary standpoint, helping others makes sense if all the migrants are related. But that’s not always the case with migrating flocks.

To find out how birds manage this dilemma, scientists outfitted a flock of 14 juvenile bald ibises (Geronticus eremita) with GPS data loggers and guided them in an ultralight plane from Austria, where they’d been hand-raised, to Italy on an autumn migration. The loggers recorded each bird’s geographical location, velocity, and…

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