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#116475 - 11/24/03 11:07 AM bird migration
wwh Offline
Carpal Tunnel

Registered: 01/18/01
Posts: 13858
While deploring the calories I was ingesting in the form of peanut butter, I was reminded how vital high caloric value can be to migratory birds. I have read that the hummingbirds what cross the Gulf of Mexico from Florida to the Yucatan peninsula store a special fat with 18 cal/gm.
Human fat is 9cal/gm if I remember correctly.
Then there is the godwit with migrates 7,000 miles from Alaska nonstop to New Zealand.I wonder how many miles per gm of fat they get.


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#116476 - 11/24/03 07:01 PM Re: bird migration
Zed Offline
Pooh-Bah

Registered: 08/27/02
Posts: 2154
Loc: British Columbia, Canada
"Gotta get my wing feathers tuned up, only getting 68 miles to the gram this fall. Maybe a tail overhaul as well."


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#116477 - 11/24/03 07:10 PM Re: bird migration
Buffalo Shrdlu Offline
Carpal Tunnel

Registered: 06/24/02
Posts: 7210
Loc: Vermont
Zed:

Dr. Bill: boy, that's a tough subject to search! no luck so far... I guess I need more calories...

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formerly known as etaoin...

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#116478 - 11/24/03 08:14 PM Re: bird migration
wwh Offline
Carpal Tunnel

Registered: 01/18/01
Posts: 13858
Dear etaoin: I can't find that special fat thing again. All I can find is that average weight is 3 gm, about doubled before migration, and down to 2.5 on arrival. Remember too, no way they can drink. May make a bit of water by burning caolories. But 18 hours non-stop, that's amazing.


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#116479 - 11/24/03 08:23 PM Re: bird migration
Buffalo Shrdlu Offline
Carpal Tunnel

Registered: 06/24/02
Posts: 7210
Loc: Vermont
we usually have a small group of three or five hummers each summer. lovely little noisy things! unbelieveable how far they travel. we have their arrival and departure dates on our calendar for several years back.

_________________________
formerly known as etaoin...

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#116480 - 11/24/03 09:13 PM Re: bird migration
wwh Offline
Carpal Tunnel

Registered: 01/18/01
Posts: 13858
The hummingbirds here are dumpy figured drab gray. They ignored the syrup feeder I put out, and spent all their time checking the row of tall slender evergreen Italian cypress. I knew they could find no aphids there, and had to look at my bird CD to discover that the eat a lot of tiny spiders, and that's what they were looking for.


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#116481 - 11/25/03 09:06 AM Re: bird migration
wwh Offline
Carpal Tunnel

Registered: 01/18/01
Posts: 13858
Here is a good URL about bird migration. It mentions "a special fat" but does not give figure for caloric value.
[url]whyfiles.org/006migration/fact_sheet.html[url]


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#116482 - 11/25/03 09:19 AM Re: bird nutrition
wwh Offline
Carpal Tunnel

Registered: 01/18/01
Posts: 13858
Dear WW: here is an article I think will interest you. It points out that exotic plants and trees do not promote growth of insects birds need for food. One more bad thing about ailanthus?
http://www.fow.org/wildlifecomm.htm


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