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Bird migration is controlled primarily by day length, signalled by hormonal changes in the bird's body. [19] On migration, birds navigate using multiple senses. Many birds use a sun compass, requiring them to compensate for the sun's changing position with time of day. [20] Navigation involves the ability to detect magnetic fields.
Bird flu 'ruffles feathers' of cattle in Texas, Kansas, and New Mexico. Migratory birds can have an outsized impact on the human world as well. In March, it was reported by the United States ...
Many birds migrate in flocks. For larger birds, it is assumed that flying in flocks reduces energy costs. The V formation is often supposed to boost the efficiency and range of flying birds, particularly over long migratory routes. All the birds except the first fly in the upwash from one of the wingtip vortices of the bird ahead.
An often-mentioned statement is that "bats can eat 1000 mosquitoes per hour." [ 37 ] [ 38 ] [ 39 ] While the little brown bat does consume mosquitoes and has high energetic needs, the study that is the basis for this claim was an experiment in which individuals were put into rooms full of either mosquitoes or fruit flies .
Unlike migratory birds, which fly during the day and feed during the night, nocturnal bats have a conflict between travelling and eating. The energy saved reduces their need to feed, and also decreases the duration of migration, which may prevent them from spending too much time in unfamiliar places, and decrease predation.
Spring has sprung, and migratory birds are returning to the area. That means one thing -- it's time to stock up on bird seed. Backyard bird feeders attract a variety of feathered friends (as well ...
Avian malaria is a vector-transmitted disease caused by protozoa in the genera Plasmodium and Haemoproteus; these parasites reproduce asexually within bird hosts and both asexually and sexually within their insect vectors, which include mosquitoes (), biting midges (Ceratopogonidae), and louse flies (Hippoboscidae). [6]
The ‘akikiki, a small, gray bird native to Hawaii, could go extinct within months. Mosquitoes are driving these birds to extinction. With only 5 left in the wild, scientists are racing to save ...