Cuco Oriental

Identificación

It is 30-32 centimetres long with a wingspan of 51-57 centimetres and a weight of 73-156 grams. The adult male has a grey head, breast and upperparts. The belly is creamy-white with dark bars. The vent is frequently buff with few markings. The legs and feet are orange-yellow and there is a bare yellow ring around the eye. Adult females and juveniles occur in two morphs. The grey morph is similar to the male but has a brownish wash on the breast. The rufous morph is reddish-brown above, paler on the underparts and with strong dark bands all over including the rump.<p>The common cuckoo (C. canorus) is very similar in appearance but is slightly bulkier with longer wings and tail and a slightly smaller head and bill. It is slightly paler grey and the barring on the underparts is a little narrower. The vent is usually white with dark bars but is more similar to Oriental cuckoo in a few individuals. Birds of the rufous morph have a plain rump with no dark bars unlike the Oriental cuckoo. Rufous morphs may have evolved to deter male harassment or host species mobbing, and may be ancestral to both common cuckoos and Oriental cuckoos.<p>The Himalayan cuckoo (C. saturatus) is extremely similar to the Oriental cuckoo but is slightly smaller and shorter-winged.<p>The call of the male Oriental cuckoo is a series of low paired notes, poo-poo, with both notes stressed equally. It is somewhat similar to the call of the hoopoe. It may be introduced with a four to eight note phrase or sometimes with grating notes. The female's call is a deep bubbling trill. Outside the breeding season, the birds are usually silent. The call of the male Himalayan cuckoo is a series of three or four note phrases with a short, high-pitched introductory note.

Taxonomía

Género: Cuculus; familia: Cuculidae; orden: Cuculiformes.

Nombre científico

Cuculus optatus

Autoridad

Gould, 1845

Orden

Cuculiformes

Familia

Cucúlidos

Género

Cuculus

Distribución y hábitat

It has a large breeding range in northern Eurasia. It breeds across much of Russia west to the Komi Republic with occasional records as far west as Saint Petersburg. It also breeds in northern Kazakhstan, Mongolia, northern China, Korea and Japan.<p>The exact extent of its wintering range is uncertain due to its secretive habits and the difficulty of separating it from the Himalayan cuckoo and other similar species. It is believed to include the Malay Peninsula, Indonesia, the Philippines, New Guinea, western Micronesia, the Solomon Islands and northern and eastern Australia with occasional birds reaching New Zealand. It has occurred as a vagrant in Ukraine, Israel and Alaska.

Área de cría

PAL : w Russia and Kazakhstan through ne Russia to Japan

Área no reproductiva

se Asia, Philippines and Indonesian Arch. to n, e Australia, New Guinea and satellites, Bismarck Arch. and Solomon Is.

Migración

Migrantes completos

Comportamiento

Patrón migratorio: Migrantes completos.

Conservación

Tendencia poblacional: en declive.

Tendencia poblacional

en declive