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bird migration #116475
11/24/03 04:07 PM
11/24/03 04:07 PM
Joined: Jan 2001
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wwh Offline OP
Carpal Tunnel
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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.


Re: bird migration #116476
11/25/03 12:01 AM
11/25/03 12:01 AM
Joined: Aug 2002
Posts: 2,154
British Columbia, Canada
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Zed Offline
Pooh-Bah
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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."


Re: bird migration #116477
11/25/03 12:10 AM
11/25/03 12:10 AM
Joined: Jun 2002
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Vermont
Buffalo Shrdlu Offline
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Zed:

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



formerly known as etaoin...
Re: bird migration #116478
11/25/03 01:14 AM
11/25/03 01:14 AM
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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.


Re: bird migration #116479
11/25/03 01:23 AM
11/25/03 01:23 AM
Joined: Jun 2002
Posts: 7,210
Vermont
Buffalo Shrdlu Offline
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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...
Re: bird migration #116480
11/25/03 02:13 AM
11/25/03 02:13 AM
Joined: Jan 2001
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wwh Offline OP
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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.


Re: bird migration #116481
11/25/03 02:06 PM
11/25/03 02:06 PM
Joined: Jan 2001
Posts: 13,858
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wwh Offline OP
Carpal Tunnel
wwh  Offline OP
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Posts: 13,858
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]


Re: bird nutrition #116482
11/25/03 02:19 PM
11/25/03 02:19 PM
Joined: Jan 2001
Posts: 13,858
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wwh Offline OP
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Posts: 13,858
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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