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The gray hawk is found from Costa Rica north into the southwestern United States. The gray hawk is 46–61 cm (18–24 in) in length and weighs 475 g (16.8 oz) on average. The adult has a pale gray body, the tail is black with three white bands and the legs are orange. It is a solid, unpatterned gray on the upper parts.
In several Buteo species found in more tropical regions, such as the roadside hawk or grey-lined hawk, reptiles and amphibians may come to locally dominate the diet. [5] Swainson's hawk , despite its somewhat large size, is something of exceptional insect -feeding specialist and may rely almost fully on crickets and dragonflies when wintering ...
Genus Pseudastur – Gray, 1849 – three species Common name Scientific name and subspecies Range Size and ecology IUCN status and estimated population Mantled hawk Pseudastur polionotus (Kaup, 1847) Argentina, Brazil, Paraguay, and Uruguay: Size: Habitat: Diet: NT White hawk Pseudastur albicollis (Latham, 1790)
The grey-backed hawk is 45 to 52 cm (18 to 20 in) long with a 104 to 116 cm (41 to 46 in) wingspan. One female weighed 660 g (23 oz). Females are about 10% larger than males and both sexes have the same plumage. Adults have a gray and white streaked head, nape, and mantle.
The tail is black or grey with three wide light grey horizontal bands on top and a narrow white tip. [7] [5] [3] The wings, legs and tail have been described as being relatively short for the body size, with a heavy bill and head. [8] The feet, legs, cere and orbital skin are yellow [9] and the bill is black with a bluish grey base. [4]
The genus Buteogallus was introduced in 1830 by the French naturalist René Lesson to accommodate the rufous crab hawk, which is therefore the type species. [2] [3] The name is a portmanteau of the genus name Buteo introduced in 1779 by Bernard Germain de Lacépède for the buzzards and the genus Gallus introduced in 1760 by Mathurin Jacques Brisson for the junglefowl. [4]
Size and ecology IUCN status and estimated population Madagascar sparrowhawk. Accipiter madagascariensis (Smith, 1834) ... Grey-bellied hawk. Accipiter poliogaster
Mean prey weights in different areas for great horned owls can vary from 22.5 to 610.4 g (0.79 to 21.53 oz), so is far more variable than that of red-tailed hawks (at 43.4 to 361.4 g (1.53 to 12.75 oz)) and can be much larger (by about 45%) than the largest estimated size known for the red-tailed hawk's mean prey weight but conversely the owl ...