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Hawks, including the accipitrines, are believed to have vision several times sharper than humans, in part because of the great number of photoreceptor cells in their retinas (up to 1,000,000 per square mm, against 200,000 for humans), a very high number of nerves connecting the receptors to the brain, and an indented fovea, which magnifies the ...
This field guide and identification app guides helps users to put a name to the birds they see, and covers 3,000 species of across the Americas, Western Europe, and India. In addition to browsing customized lists of birds for any location in the world, users can answer simple questions to get a list of most likely species, along with images and ...
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As of 2010, HawkQuest had 28 individual eagles, falcons, owls, and hawks.The 15 species represented are bald eagle, golden eagle, American kestrel, peregrine falcon, prairie falcon, barred owl, burrowing owl, barn owl, great horned owl, spectacled owl, Eurasian eagle-owl, Eastern screech owl, ferruginous hawk, red-tailed hawk, and Harris's hawk.
"The hawk is a magnificent bird, soaring up on the warm air currents and rising above to gain a perspective over the whole landscape," he describes. "It delights me every time I see a hawk."
An autonomous recording unit (ARU) is a self-contained audio recording device that is deployed in marine or terrestrial environments for bioacoustical monitoring. The unit is used in both marine and terrestrial environments to track the behavior of animals and monitor their ecosystems.
Hawks fly by flapping their wings rapidly then relying on momentum to glide through the air. [20] Like other birds, they are known to form flocks when migrating, which improves survival rates over traveling alone. Flocks of birds, especially hawks, are sometimes called "kettles" in the United States. [non sequitur] [19]: 215–16
The short-tailed hawk (Buteo brachyurus) is an American bird of prey in the family Accipitridae, which also includes the eagles and Old World vultures. As a member of the genus Buteo , it is not a true hawk and thus also referred to as a "buteo" or (outside North America) "buzzard".