Astore codalunga

Urotriorchis macrourus

Un falco dal nome appropriato della foresta africana di pianura, identificabile dal suo profilo distintivo mentre vola attraverso aree aperte. La coda lunga, a strisce bianche e nere di questa specie contrasta con il suo sottocoda e groppone bianchi. Mostra anche un dorso e una testa grigio ardesia, parti inferiori di un solido rossiccio e una gola bianca. La rara morfo scuro appare più nero sopra, con parti inferiori color ardesia. Emette un forte strillo, lungo un secondo, che cala di tono verso la fine, spesso seguito da un secondo strillo più forte. Si sovrappone con il più piccolo Astore pettorosso, ma si noti la coda sproporzionatamente lunga.

Identificazione

The long-tailed hawk is a distinctively shaped raptor with a very noticeable long, barred tail and is dark grey on its upperparts and chestnut on its underparts with a contrasting white throat and undertail coverts. In flight the white flight feathers on the underwing are heavily barred with dark grey. There is a rare morph which has a grey breast, with a paler grey throat but still has the white undertail coverts. The bill is black, the eyes, cere, legs and feet are yellow. Juveniles are browner, with a white-breasted "plain" morph and a "marked" morph which has the breast streaked with brown. It has a wingspan of 81–90 centimetres (32–35 in) and a total length of 56–65 centimetres (22–26 in), including the tail of 30–37 centimetres (12–15 in). Females are about 15% larger than males. Since the tail comprises about 56% of this raptor's total length, this species ties with the cinereous harrier as the raptor with the longest tail relative to its body size.<p>It is a rather vocal bird which is often first detected by the long drawn out screech given by birds perched in the canopy.

Tassonomia

Nome scientifico
Urotriorchis macrourus
Autorità
(Hartlaub, 1855)
Ordine
Accipitriformi
Famiglia
Accipitridae
Genere
Urotriorchis

Areale e habitat

The long-tailed hawk occurs in the tropical rainforests of western and central Africa, from Guinea in the west, along the Gulf of Guinea coast south to northern Angola, east to the southern Central African Republic, northern Democratic Republic of Congo, South Sudan and western Uganda.

Migrazione
Resident species

Conservazione

Tendenza della popolazione
declining

Foto

Distribuzione

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