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Latest Flight feather Stories

2009-06-16 07:34:03

Why aren't birds larger? Fifteen-kilogram swans hold the current upper size record for flying birds, although the extinct Argentavis of the Miocene Epoch in Argentina is estimated to have weighed 70 kilograms, the size of an average human. In a forthcoming article in PLoS Biology, Sievert Rohwer, and his colleagues at the Burke Museum at the University of Washington, provide evidence that maximum body size in birds is constrained by the amount of time it takes to replace the flight feathers...

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2009-03-12 13:30:00

Experiments show that hummingbirds suffer few energy costs when they grow long tails 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. "We estimate that having a long tail increases a bird's daily metabolic costs by 1 to 3 percent,...


Latest Flight feather Reference Libraries

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2009-01-20 21:15:13

The Standard-winged Nightjar (Macrodipteryx longipennis) is a species of bird that is a resident breeder in Africa from Senegal east to Ethiopia. It is found in dry savannah habitats, with some scrub. This bird is 7.9 to 9 inches long. This nightjar is relatively short-tailed, and lacks white in the wings or tail. The song is a churring trill. The adult male has a bizarre wing ornament during the breeding season, with a broad central flight feather on each wing. In normal flight, these...

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Word of the Day
cacodemon
  • An evil spirit; a devil.
  • A nightmare.
  • In astrology, the twelfth house of a scheme or figure of the heavens: so called from its signifying dreadful things, such as secret enemies, great losses, imprisonment, etc.
'Cacodemon' comes from a Greek term meaning 'evil genius.'
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