Pacific long-tailed cuckoo

The long-tailed koel (Urodynamis taitensis), also known as the long-tailed cuckoo, Pacific long-tailed cuckoo, sparrow hawk, home owl, screecher, screamer or koekoeā in Māori, is a species of the Cuculidae bird family (the cuckoos). It is the only species placed in the genus Urodynamis. It is a migratory bird that spends spring and summer in New Zealand, its only breeding place, and spends winter in the Pacific islands. It is a brood parasite, laying its eggs in the nests of other bird species and leaving them to raise its chicks.

The long-tailed koel is approximately 40–42 cm in length, with a wingspan of approximately 47–52 cm, and weighs about 120 grams. It has broad pointed wings and a long tail that is softly rounded at the tip. Its beak is short and stout with a slightly hooked tip. It has brown barring to brown upperparts, and dark streaking to white underparts. Both males and females share similar features. A juvenile cuckoo is markedly different from the adult: it is spotted, with buff underneath and on the sides of the head and neck.

Adult. Top of head and hindneck, dark brown, boldly streaked buff. Supercilium, White's, bordered below by bold dark-brown eye stripe continuing downsides of neck, cheeks, chin, throat and foreneck, whites with thin brown stripes and fine black streaking on near neck and throat. The remainder of the upperparts are brown with white spotting on wing. Tail is tipped white. The underbody is white with course black brown streaking. Legs and feet are gray to green.

The long-tailed koel have a loud and intense sound, a "shrill whistle"; it is sometimes called the "screamer".