Long, sexy tails not a drag on male birds

The long tails sported by many male birds in the tropics look like they're a drag to carry around and a distinct disadvantage when fleeing predators, but experiments by University of California, Berkeley, biologists shows that they exact only a minimal cost in speed or energy - at least in hummingbirds.

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<p><a href="http://www.physorg.com/news156075588.html">Long, sexy tails not a drag on male birds</a></p> <p>The long tails sported by many male birds in the tropics look like they're a drag to carry around and a distinct disadvantage when fleeing predators, but experiments by University of California, Berkeley, biologists shows that they exact only a minimal cost in speed or energy - at least in hummingbirds.</p>