Slender-billed Kite
Helicolestes hamatus
Medium-sized, dark raptor with distinctive shape. Adult plumage is entirely slate gray with red legs; immature similar but shows some pale barring on underparts and tail. Note contrasting yellow eye and exceptionally long, decurved bill; in flight, shows very short tail, broad wings, and lack of any white in plumage. Inhabits swampy forests, where it perches quietly at lower and middle levels, preying on snails. Soars frequently but seldom high or for very long (note distinctive flight profile). Call is an explosive single note, falling in pitch and with complaining quality, much like call of Roadside Hawk but more nasal. Most similar to Snail Kite but has yellow (not red) eye, shorter tail with no white, and is generally found in and over closed-canopy forest habitats that Snail Kite avoids.
Identification
The slender-billed kite is a slaty gray kite with broad, rounded wings and a short, square tail. The species ranges from 36 to 41 centimeters in length and possesses a wingspan of 80–90 centimeters. There is no sexual plumage dimorphism within the species; however, females tend to be larger than the males, weighing between 367 and 485 grams while males weigh between 377 and 448 grams. Their characteristically sharp black beak is hooked, matched by sharp, black talons. Their eyes are yellowish, and their face and legs are orange-red. Juveniles resemble adults, but have brownish eyes and three narrow white bands in the tail.<p>Both genders resemble the male snail kite, and the slender-billed kite has often been included in the same genus, Rostrhamus. Adults are distinguished by their yellow, rather than red, eyes and a noticeably shorter tail. Other differences are found in shorter wings and more slender beaks. Nestling slender-billed kites sport a more similar plumage to their adult form than the nestlings of snail kites to theirs.<p>Their primary call is a nasal kee-ee-aay-aay-aay that begins with a sharp increase in frequency followed by a steady decline. This call is often heard in-flight or in response to predators. Their second call is a repeating ker-ah with oscillating frequency (sometimes followed by repeating ah-ahs) heard as they approach their mate in the nest.
Taxonomy
- Scientific name
- Helicolestes hamatus
- Authority
- (Temminck, 1821)
- Order
- Accipitriformes
- Family
- Accipitridae
- Genus
- Helicolestes
Range and habitat
- Migration
- Resident species
Conservation
- Population trend
- declining
Photos
Distribution
Bird Calls
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