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Raptor Species
Broad-winged Hawk
Buteo platypterus
Taxonomy:
Class: Aves
Order: Falconiformes
Family: Accipitridae
Subfamily: Buteoninae
Genus: Buteo
Length: 13-17 in.
Weight: 11-17 oz.
Wingspan: 32-36 in.
Common Names: broadwing
Etymology: buteo (Latin) - "kind of falcon or hawk"; platypterus (Greek) - "broad-winged"
Description: Their small crow-like size sets the broad-winged hawk
apart from other North American buteos. It has short but rather pointed wings with only three
of the outer primaries notched. The tail has alternating broad bands in black and white. The
back and wings are dark brown. In adults, the breast has narrow rufous barring. In immature
birds, the breast is buffy with varying amounts of dark spotting. Slight malard stripe
(mustache), and light square window on wings.
Flight: Glides and soars on flattened wings, labored flapping soar.
Still-hunting from perches seems to be the preferred hunting technique. Pointed wings can
sometimes be confused with peregrine falcon.
Voice: Two-syllable whistle "pee-wee," first note slightly higher
in pitch. The male's call is noticeably higher than the females.
Habitat: Prefer continuous rather than broken woodlands, although
they use edges of openings for hunting. Most nest near water.
Distribution: They follow routes that concentrate birds into
large groups of thousands of birds. There is spectacular kettling of a huge column of
birds before gliding off the top to the next thermal. Travel distances of 10,000-11,000
miles round trip. Migrate to Peru, Brazil, Guatemala, South and Central America.
Weather conditions and geographic conditions make them move in mass but not flock.
Nesting: Place nest in crotch of tree, rarely reuse nest in
consecutive years, might renovate old crow, other raptor, or squirrel nest, often in the
vicinity of water. 25-40 feet high in lower third of tree. 2-4 eggs are laid, and the
female incubates while male provides food. Incubation lasts 28-31 days; young fledge by
the sixth week. Clutch size increases as you go south to north.
Food: Small mammals and birds, lizards, frogs, snakes, and invertebrates.
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