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Ornithology/Accipitriformes

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Main article: Ornithology


Accipitriformes is an order that includes most diurnal birds of prey, including hawks, eagles, and kites (but NOT falcons). They were previously included in Falconiformes, but a DNA study indicated that they are not closely related to falcons.

Osprey (Pandionidae)

Osprey
Species Pandion haliaetus
Habitat Anywhere near water
Distribution Temperate and tropical regions of all continents, except Antarctica
Diet Fish
Behavior Migratory birds, generally breed in the northern hemisphere and migrate south for winter. They are solitary, living alone for most of the year except the breeding season when they form breeding pairs. Small flocks of 5-10 birds have been seen roosting together.
Nesting Nests are built of sticks and lined with biological materials. New nests are relatively small (>2.5 feet diameter and 3-6 inches deep), however after adding to the nest for years they can end up 10-13 feet with 3-6 feet diameter. The clutch size is 1-4 eggs. Egg length is 2.2-2.7 in (5.5-6.8 cm); egg width is 1.6-2.0 in (4.2-5 cm). The incubation period lasts for 36-42 days. The nestling period lasts for 50-55 days. Eggs are cream to pinkish cinnamon; wreathed and spotted with reddish brown.
Conservation

Least concern

Hawks, Kites, Eagles, and Allies (Accipitridae)

Bald Eagle
File:About to Launch (26075320352).jpg
Species Haliaeetus leucocephalus
Habitat Large bodies of water
Distribution Most of Canada and Alaska, all of the contiguous United States, and northern Mexico
Diet Fish
Behavior During migration and winter they can be quite social, but are highly territorial and solitary during nesting season. Many migrate south for winter, but some may stay year-round.
Nesting Nest in tall conifers when available, providing visibility and easy flight access. They may also nest in deciduous trees, mangroves, and cactus. Nests are large, 5-6 feet diameter and 2-4 feet tall, with a variety of shapes. Ground nests are built of whatever is available. Nests may be reused and can take up to 3 months to build. The clutch size is 1-3 eggs. Egg length is 2.3-3.3 in (5.8-8.4 cm); egg width is 1.9-2.5 in (4.7-6.3 cm). The incubation period lasts for 34-36 days. The nestling period lasts for 56-98 days. Eggs are dull white, usually without markings.
Call Link
Conservation

Least concern
Northern Harrier
Species Circus cyaneus
Habitat Wetlands and grasslands
Distribution Northern harriers breed in North America from northern Alaska and Canada south to central and southern California, Mexico and portions of the southern U. S., excluding the southeast region. Wintering occurs from southern Canada to northern South America.
Diet Small mammals
Behavior Partial migrants, birds from northern breeding areas migrate farther south for the winter than those from southern breeding areas. Engage in courtship displays to attract females. Exhibit both monogamous and polygamous mating systems.
Nesting Nests are on the ground, normally in a dense clump of vegetation. Nest building takes 1-2 weeks. The clutch size is 4-5 eggs. Egg length is 1.6-2.1 in (4.1-5.3 cm); egg width is 1.3-1.6 in (3.2-4 cm). The incubation period lasts for 28-36 days. The nestling period lasts for 14 days. Eggs are dull white, usually with no markings.
Call [Link to call/leave blank if no call is required Link]
Conservation

Least concern


Cooper's Hawk
Species Astur cooperii, formerly placed in the genus Accipiter, Accipiter cooperii
Habitat Open woodlands
Distribution Native to the North American continent and found from southern Canada to Mexico.
Diet Birds
Behavior Winter over most of the continental US, northern populations migrate as far south as southern Mexico and Honduras while southern populations tend to be year-round. Are generally solitary birds outside of breeding season. Monogamous, but they don't exhibit social interaction outside of the breeding pair.
Nesting They build nests in trees, often on flat ground instead of hillsides, and in dense woods. Nests are typically 25-50 feet high, often about two-thirds of the way up the tree in a crotch or on a horizontal branch. The clutch size is 2-6 eggs. Egg length is 1.7-2.0 in (4.4-5.1 cm); egg width is 1.4-1.6 in (3.5-4 cm). The incubation period lasts for 30-36 days. The nestling period lasts for 27-34 days. Eggs are pale blue to bluish white.
Call [Link to call/leave blank if no call is required Link]
Conservation

Least concern
Red-tailed Hawk
Species Buteo jamaicensis
Habitat Any habitat except thick forest and tundra
Distribution North America
Diet Small mammals
Behavior The northernmost populations migrate south, while more southern ones are year-long. Generally solitary but exhibit social behaviors during breeding season and in family groups. Pairs often remain together for life.
Nesting Nests are built in a high place where there is a good view. Nests may be reused year after year. The clutch size is 1-5 eggs. Egg length is 2.2-2.7 in (5.5-6.8 cm); egg width is 1.7-2.0 in (4.3-5 cm). The incubation period lasts for 28-35 days. The nestling period lasts for 42-46 days. Eggs are white or buffy, blotched or speckled with buff, brown, or purple..
Call Link
Conservation

Least concern


Golden Eagle
Species Aquila chrysaetos
Habitat Open areas
Distribution North America
Diet Mammals
Behavior Generally solitary or found in pairs. They will migrate from Canadian provinces and northern areas to northeastern states for winter.
Nesting Usually nest on cliffs or other high places that may be man-made. The clutch size is 1-3 eggs. Egg length is 2.7-3.4 in (6.8-8.6 cm); egg width is 1.9-2.5 in (4.9-6.4 cm). The incubation period lasts for 41-45 days. The nestling period lasts for 45-81 days. Eggs are white to cream or pale pink, usually with small brown blotches.
Call [Link to call/leave blank if no call is required Link]
Conservation

Least concern