Northern GoshawkAstur atricapillusWhere and when to see them

In Alaska, the bird historically catalogued as northern goshawk is now generally treated as the American goshawk, Astur atricapillus, separate from the Eurasian goshawk. This powerful forest hawk has broad wings, a long steering tail and a notably fierce expression. Females are substantially larger than males. Its presence can be difficult to detect despite its size, because much of its hunting and nesting takes place within extensive woodland rather than open coastal scenery.

Size

46–61 cm long; 89–127 cm wingspan

Weight

0.6–1.4 kg

Lifespan

Not reliably established

Status

Least Concern

American goshawks typically hunt from concealed perches or make low searching flights through woodland, accelerating sharply when prey appears. They can weave between trunks and pursue quarry into more open ground. Breeding pairs defend territories, and adults may call repeatedly or swoop at intruders near an active nest. Outside the nesting period they are usually solitary and unobtrusive; northern birds sometimes move farther south when food becomes scarce. Courtship flights involving spectacular aerial displays can be observed in early spring, though rarely. They are known for their fierce defense of nests, a behavior that emphasizes the importance of respecting their space and leaving undisturbed.

• The former northern goshawk was split into American and Eurasian species by several major modern bird checklists.
• Female American goshawks can be roughly half again as heavy as males.
• A breeding territory may contain several alternate nest structures used in different years.
• Their long tails act as steering surfaces during rapid turns through forest.

Late spring and summer provide long daylight hours for forest excursions in Alaska, but dense foliage and secretive behaviour can limit views. Winter birds may be easier to notice in more open woodland. No season makes this scarce, wide-ranging raptor predictable. While generally elusive, spotting a goshawk during migration periods in spring and fall can offer a slightly increased chance of observation along forest corridors. Nesting season in spring can be a time of increased territorial activity, though viewing remains challenging.

In Alaska, goshawks occupy boreal and coastal forests, including mature spruce, hemlock, birch and mixed stands. Nesting usually requires substantial trees and suitable forest structure. Forest edges, openings and wooded valleys provide hunting opportunities, but exposed shores are not their main habitat. They show a preference for older growth forests with a mix of tree ages and densities, providing both cover and open understories. Access to water bodies like rivers or lakes can also be important for their prey base.

Their diet includes medium-sized birds and mammals, with regional prey such as grouse, squirrels, snowshoe hares and other forest birds. Powerful feet and long talons secure prey. The balance between birds and mammals changes with habitat, season and local prey populations. In addition to snowshoe hares, grouse species like ruffed grouse and spruce grouse are common prey. They are highly agile hunters, capable of navigating dense forest with remarkable speed and precision.

Common name

Northern Goshawk

Scientific name

Astur atricapillus

Animal group

Birds

Size

46–61 cm long; 89–127 cm wingspan

Weight

0.6–1.4 kg

Lifespan

Not reliably established

Status

Least Concern

Identification

The Alaskan American goshawk is larger and heavier than a Cooper's hawk, with a bold white eyebrow and finely barred gray adult underparts; Eurasian goshawks are very similar but geographically separate. Juvenile goshawks are browner overall with streaked underparts and a less distinct white eyebrow, making them distinguishable from adults. Their broad, rounded wings and relatively long tail are characteristic in flight.