Gheppio maggiore

Identificazione

The plumage of the adult is mainly pale rufous, both above and below. The back, upperwing and flanks are barred with black. The breast has dark streaks and the head is streaked but has no malar stripe unlike the common and lesser kestrels. The rump and tail are grey with black bars; the tail has a white tip. In flight, the whitish underwing contrasts with the darker body. The iris of the eye is whitish, distinguishing the bird from any similar species. The bill is mainly blue-grey and the feet and cere are yellow. Juvenile birds have rufous instead of grey on the tail, streaked flanks and a dark eye.<p>The bird is 29–37 cm (11–15 in) long with a wingspan of 68–84 cm (27–33 in) The southern subspecies F. r. rupicoloides weighs about 181–334gr (.400–.736 lb). The form F. r. arthuri is smaller, weighing about 165–252gr (.364–.556 lb). The northern subspecies F. r. fieldi is also small and is paler than the others.<p>The species is usually silent but has a shrill, repeated call.

Tassonomia

Nome scientifico

Falco rupicoloides

Autorità

Smith, A, 1829

Ordine

Falconiformi

Famiglia

Falconidae

Genere

Falco

Areale e habitat

It occurs in open, arid areas where it inhabits grassland, savannas and semi-desert. It is often associated with acacias. It prefers areas where the ground cover is lower than 50 cm. It is found from sea-level up to 2150 metres, particularly between 800 and 1800 metres.<p>It is fairly common and widespread in the southern parts of its range but is scarce and patchily distributed further north. The form F. r. rupicoloides breeds in Namibia, Botswana, Zimbabwe, parts of Angola and Zambia and in much of South Africa apart from the wetter regions of the south and east. F. r. arthuri is found in Kenya and northern Tanzania while F. r. fieldi occurs in Ethiopia, Eritrea, northern Somalia and probably northern Kenya.<p>The total range covers about 3.5 million km2. The population is stable and is likely to be in the order of 100,000 to 200,000 pairs. Most birds are sedentary but some are nomadic or dispersive.

Migrazione

Resident species

Conservazione

Tendenza della popolazione

stable