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> The way the birds fly they help each other:-http://www.nature.com/news/precision-formation-flight-astounds-scientists-1.14537-How does this develop as an instinct? I can&apos;t explain it by the usual just-so stories of Darwinian evolution.-"Migratory birds coordinate their wing flaps with much more finesse than previously thought, so as to reap the best energy savings from flying in formation, suggests a new study.  - "In 2011, as part of a reintroduction programme, captive-bred ibises following an ultralight aircraft to their wintering grounds arranged themselves in the shape of a V. Data loggers on their backs captured every position and wing flap, yielding the most compelling experimental evidence yet that birds exploit the aerodynamics of the familiar formation to conserve energy.-Theoretical models had previously shown that the V formation, seen in other migratory birds such as geese, could enable trailing birds to save energy. But the models also indicated that the birds&apos; coordination would have to be exceptionally precise to make a difference, and many scientists had doubted that the animals could achieve such a feat during flight, says ecophysiologist Steven Portugal at the Royal Veterinary College in Hatfield, UK.-"They are just so aware of where each other are and what the other bird is doing," Portugal says. "And that&apos;s what I find really impressive."