Gheppio di Dickinson

Identificazione

It is a fairly small, stocky kestrel with a large, square head. It is 27–30 cm (11–12 in) long with a wingspan of 61–68 cm (24–27 in) and a weight of 167–246 g (5.9–8.7 oz). The female is about 4% larger and 10-20% heavier than the male. The plumage is mostly dark grey with a pale head and rump. The tail is grey with narrow black bars and a broad subterminal band. The underside of the flight feathers are also barred. The cere and feet are yellow and there is bare yellow skin around the eye. The bill is dark grey and the eyes are brown. Juvenile birds are grey-brown with barred flanks and without the paler head and rump. They have a greenish cere and eye-ring.<p>It is usually silent but has a high-pitched alarm and contact call. At the nest, a soft, mewing call attracts the young for feeding.

Tassonomia

Nome scientifico

Falco dickinsoni

Autorità

Sclater, PL, 1864

Ordine

Falconiformi

Famiglia

Falconidae

Genere

Falco

Areale e habitat

It inhabits savanna and open woodland, particularly swampy areas near water. It favours miombo woodland and is typically associated with palm trees (such as Hyphaene and Borassus species) and is also often found near baobab trees. It occurs in coconut plantations in some areas.<p>Its range covers most of Mozambique, Zimbabwe, Zambia and Malawi along with north-eastern South Africa (mainly in Kruger National Park), northern Botswana, north-east Namibia, eastern Angola, southern Democratic Republic of the Congo and parts of Tanzania. It is an occasional visitor to Kenya. The total range is about 3,400,000 km2 (1,300,000 sq mi). It is generally rather scarce but is commoner in some areas such as Zanzibar and Pemba Islands. Loss of palm trees is a potential threat to the species.

Migrazione

Resident species

Comportamento

It usually hunts from a perch and only occasionally hovers. Large insects such as grasshoppers form the bulk of the diet. It also feeds on lizards and amphibians and sometimes birds, bats, rodents and snakes. It is often attracted to grass fires where it preys on fleeing insects and other prey.<p>The breeding season lasts from July to October in Tanzania and September to December further south. The nest is a simple scrape with no material used. It is sited 2 to 18 m (6.6 to 59.1 ft) above the ground in the crown of a dead palm or in a hole in a baobab. Sometimes the old nest of a Hamerkop is used. One to four eggs are laid. They are cream-coloured with reddish-brown markings and are incubated by the female for at least 30 days. The young birds fledge after approximately 33 to 35 days.

Conservazione

Tendenza della popolazione

stable