Pacific Long-tailed Cuckoo

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".

Endemic to New Zealand, where they can be found on Little Barrier Island, the West Coast of the South Island, Nelson, and throughout the central North Island. The long-tailed koel prefers to live in forest on mainland and near shore or offshore islands, from sea level. in mountainous areas, more often on vegetated ridges than in valleys. Usually in dense, closed canopy of native forests dominated by beech (Nothofagus), broadleaf species or podocarps or mixtures, with or without shrub layer. Usually surrounded by plantations of pines (Pinus). Can be around other vegetation such as mānuka (Lepotospermum scoparium) by rivers or forests or mountainous areas. Occasionally can be found in recreational parks, residential areas and gardens. In New Zealand, the cuckoos live mainly in native forest, particularly up in the canopy. They also live in exotic pine plantations, scrub, cultivated land and suburban gardens. In the Pacific islands they live in lowland forest, gardens and coconut plantations. Individuals are usually solitary. The long-tailed koel breeds only in New Zealand, where it is resident in the warmer months, from early October until February or March, sometimes April and occasionally later. The length of an average one-way journey from New Zealand to Polynesia is around 2500–3500 kilometres and thus travel over 6000 kilometers. …

The long-tailed koel mostly eats insects. It also eat bird eggs and nestling birds, adult birds as large as sparrows, New Zealand bellbirds and thrushes, and lizards. It occasionally eats fruit and seeds. Young birds are fed insects by their host parents. The long-tailed koel hardly ever forage on the ground and instead forage at the top of trees or in shrubs. Foraging is mainly done at night.

Māori believed that the arrival of long-tailed cuckoos indicated that it was time to plant sweet potato or kūmara, and that their departure meant it was time to harvest them.