Himalayan Swiftlet

Largish hawk with a short tail and very broad wings. White head, belly and tail with a barred black back. Similar to White-necked Hawk but larger, with a blue base to the bill, a whiter uppertail and an entirely pale undertail. Juvenile is paler above with a few dark spots on the head. Found in extensively forested landscapes where often seen soaring over the canopy or perched prominently.

A forest skulker with clean-cut pale underparts, a gray wash on the side of the breast and face, and rusty brown upperparts and central crown. The tail has distinctive white tips to the outer feathers. Juvenile is heavily spotted above. A shy and inconspicuous resident in the dense understory of lowland and mid-altitude forest up to 1500 meters, found singly and in pairs; several individuals may follow ant swarms, where they lose their fear of humans. Sings a loud musical 3–4 note “whooo-wheet-whooee” and similar melodic notes; also gives harsh “chht” calls.   

Anis are bizarre, coal-black cuckoos with long floppy tails and unique, curiously tall, flattened bills. Smooth-billed occurs in a variety of open and semi-open habitats in tropical lowlands and foothills, typically staying low in shrubs and grasses. Gregarious and not particularly graceful; usually seen crashing around awkwardly in small groups. Flies with choppy wingbeats and long glides. Widespread and common throughout much of South America and the Caribbean, extending as far west as the Pacific slope of Costa Rica and north to Florida. Compare with the very similar Groove-billed Ani, which overlaps in some areas of Central and South America. Note especially the bill shape: Smooth-billed often (but not always) has a taller ridge on the top of the bill, and a sharper angle on the lower edge of the bill. The sides are typically smooth, rarely with weak grooves. Voice is also important: listen for a rising, hawklike whistle with an inflection at the end. Dark eye, size, and habitat help separate from Greater Ani in South America and Panama.