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Re: Altitude effects on hummingbird flight?
You have a good eye. There are two ways to hover at altitude. One is with
longer wings and a slower frequency, the other is with shorter wings and a
higher frequency. You've described both methods.
----- Original Message -----
From: "Tommy Tyrberg" <email@example.com>
To: <firstname.lastname@example.org>; <email@example.com>
Sent: Thursday, December 21, 2006 2:28 PM
Subject: Re: Altitude effects on hummingbird flight?
Personally I think this is nonsense. .....
The most extreme high-altitude hummer, the Bearded Helmetcrest which you
never see below the paramo and which goes to about 17,000 feet is actually
rather short-winged for a hummingbird.
The Giant Hummingbird (the species mentioned in the second paragraph) is
long-winged and also goes quite high, but it has a much slower wing-stroke
than other, smaller hummingbirds (including the Great Sapphirewing).....
Admittedly I haven't watched either the Helmetcrest or the Giant higher
than to about 13,000 feet myself, but at that altitude they certainly
didn't seem in the least bothered by the thin air.>