Hawaiian Hawk

Buteo solitarius

Order

FALCONIFORMES

Family

Kites, Eagles and Hawks (Accipitridae)

Code 4

HAWH

Code 6

BUTSOL

ITIS

Egg Color:

Light Blue



Number of Eggs:

1 - 3



Incubation Days:

38



Egg Incubator:

Female



Nest Location:

In a large tree placed near the trunk.



Nest Material:

Sticks, twigs, and leaves.



Migration:

Nonmigratory



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General

Hawaiian Hawk: Also called Io, the Light morph is dark brown above and cream below with brown flecks on the upperbreast. Dark morph is dark-brown overall with variably gray and brown tinge along underparts; black bill with yellow cere. Sexes are similar, female is larger. Juvenile light morph has white-buff crown and nape, fewer brown flecks on breast. Juvenile dark morph is dark-brown overall, head and upperback are gray-brown, underparts show variable white tint. Cere, legs and feet are blue-green.

Range and Habitat

Hawaiian Hawk: Endemic to the island of Hawai'i, although vagrants occasionally wander to Maui, O'ahu, and Kaua'i. Regularly seen near volcanoes, and along the Hamakua Coast. Found in a wide variety of habitats, from exotic forest and pastureland in the lowlands to native forest as high as 8,900 feet in elevation.

Breeding and Nesting

Hawaiian Hawk: They nest from March through September. Both sexes participate in nest building. One to three light blue eggs are laid in a nest of twigs, sticks and leaves high in a tree. They are incubated by the female for 38 days. Both parents aggressively defend the nest. The chick fledges at seven or eight weeks. Adults deliver prey to juveniles for 25 to 37 weeks after fledging.

Foraging and Feeding

Hawaiian Hawk: These hawks feed on rats, small birds, stream animals and a variety of insects. They will either dive on prey from the air or hunt from a perched position. They capture small avian prey, often from the peripheral branches of trees. Invertebrates form a lesser part of their diet, including cockroaches, spiders, hawk moths, caterpillars, crayfish and dragonflies.

Vocalization

Hawaiian Hawk: Call is a high pitched scream "eeeee-oh" and a series of piercing "keeee-up" often repeated.

Similar Species

Hawaiian Hawk: Not likely to be confused with any other species.

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UnderpartsX

Belly, undertail coverts, chest, flanks, and foreneck.

BreastX
The upper front part of a bird.
CereX
Also called the operculum, it is a smooth and featherless patch of skin located where the beak attaches to the forehead.
CrownX
The crown is the top part of the birds head.
NapeX
Also called the hindneck or collar, it is the back of the neck where the head joins the body.
Parts of a Standing bird X
Head Feathers and Markings X
Parts of a Flying bird X