Talk:White-throated needletail

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Flight speed edit

Latest comment: 16 years ago1 comment1 person in discussion

The claimed speed of 170 km/h in horizontal flight is long known to be false, as the greatest known airspeed achieved by a swift (species unspecified) was 40 km/h (25 mph). Naturally they may achieve greater speeds when assisted by wind or in dives. --Anshelm '77 00:52, 10 November 2007 (UTC)Reply

Size? edit

Latest comment: 15 years ago1 comment1 person in discussion

How big is this bird? SpectrumDT (talk) 20:31, 2 November 2008 (UTC)Reply

Fun Facts edit

Latest comment: 15 years ago1 comment1 person in discussion

Birds are endotherms. Rather than avoiding exertion and relying on anaerobic respiration to supply peak needs, birds maintain a high metabolic rate with aerobic respiration. The fastest bird, the Asian spine-tailed swift, flies 100 mph in level flight, with a blood temperature of 112º F! —Preceding unsigned comment added by 130.127.255.224 (talk) 19:28, 26 March 2009 (UTC)Reply

Flight speed edit

The references given are only anecdotes. The Common swift (Apus apus) was accurately measured at 40 km/h in steady flight but can accelerate to about 70 km/h in level flight. Larger species can accelerate to only slightly higher speeds. Of course, in slightly descending flights all swifts (and actually any aerodynamic bird) can fly at more than 100 km/h, but probably not much higher than 150km/h.

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