Ошейниковый стриж Streptoprocne zonaris

Large, spectacular swift, often seen in swirling flocks, at times with other species of swifts. Roosts and nests mainly in caves and behind waterfalls, but ranges widely over forests, open areas, and towns, from highlands to coastal lowlands. Note the large size, complete white collar, and forked tail tip. Varied screaming and chattering calls can suggest parakeets.