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sciencehabit (1205606) writes "Anyone watching the autumn sky knows that migrating birds fly in a V formation, but scientists have long debated why. A new study of ibises--where researchers took to microlight planes and recorded birds strapped with GPS in-flight--finds that these big-winged birds carefully position their wingtips and sync their flapping, presumably to catch the preceding bird’s updraft and save energy during flight." Link to Original Source
"Necessity is the mother of invention" is a silly proverb. "Necessity
is the mother of futile dodges" is much nearer the truth.
-- Alfred North Whitehead