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Most birds fly below 500 feet except during migration. There is no reason to expend the energy to go higher -- and there may be dangers, such as exposure to higher winds or to the sharp vision of hawks. When migrating, however, birds often do climb to relatively great heights, possibly to avoid dehydration in the warmer air near the ground. Migrating birds in the Caribbean are mostly observed around 10,000 feet, although some are found half and some twice that high. Generally long-distance migrants seem to start out at about 5,000 feet and then progressively climb to around 20,000 feet. Just like jet aircraft, the optimum cruise altitude of migrants increases as their "fuel" is used up and their weight declines. Vultures sometimes rise over 10,000 feet in order to scan larger areas for food (and to watch the behavior of distant vultures for clues to the location of a feast). Perhaps the most impressive altitude record is that of a flock of Whooper Swans which was seen on radar arriving over Northern Ireland on migration and was visually identified by an airline pilot at 29,000 feet. Birds can fly at altitudes that would be impossible for bats, since bird lungs can extract a larger fraction of oxygen from the air than can mammal lungs.
Originally posted by packinupngoin
reply to post by dbloch7986
I think what is more concerning is the fish. Its not like all fish in a poison area its one group of fish. I used to live in Miami so I've seen fish beach themselves before but never like this.
What species is next?
SCORES of fish have been found dead in a brook running through a Peterborough beauty spot.
Walkers have been left horrified at the sight of the fish lying on top of the waters in Werrington Brook, in Cuckoo’s Hollow, Peterborough.
Environment Agency officials have been alerted but say it could be some days before the results of tests to find out the cause of the death are known.
Fisheries officials are investigating the death of hundreds of snapper washed up on Coromandel Peninsula beaches.
Beachgoers at Little Bay and Waikawau Bay found the fish - many with their eyes missing - dead on the sand yesterday.
Originally posted by dbloch7986
reply to post by dandare57
Thats interesting that it was due to "disease". I hope its not a disease humans should be worried about. How odd though, that they would all die at the same instant due to a disease. I don't think that is very common.
Beachgoers at Little Bay and Waikawau Bay found the fish - many with their eyes missing - dead on the sand yesterday.
Originally posted by spikey
Originally posted by dbloch7986
reply to post by dandare57
Thats interesting that it was due to "disease". I hope its not a disease humans should be worried about. How odd though, that they would all die at the same instant due to a disease. I don't think that is very common.
The dead fish are only about 100-150 miles away, quite close, maybe the fish died first, floated and washed up on the shore, which the birds then could have eaten...whatever killed the fish may also have killed the birds.
Beachgoers at Little Bay and Waikawau Bay found the fish - many with their eyes missing - dead on the sand yesterday.
The eyes of an animal are the prime target for feeding birds...only problem is these fish are on the other side of the planet, although the same thing might have happened in the US.
edit on 4/1/2011 by spikey because: Added info.edit on 4/1/2011 by spikey because: (no reason given)
Small comment. Red winged black birds do not eat fish. Dead or alive.edit on 4/1/11 by remembering because: (no reason given)extra DIV