Wednesday, July 11, 2012

>Tockus nasutus (African Grey Hornbill)

African Grey Hornbill

African Grey Hornbill
Female near Lake Naivasha, Kenya
Male near Crater Lake, Naivasha, Kenya
Conservation status

Least Concern (IUCN 3.1)
Scientific classification
Species:T. nasutus
Binomial name
Tockus nasutus
(Linnaeus, 1766)
Global range in blue

adult male in Limpopo, South Africa

The African Grey Hornbill (Tockus nasutus) is a hornbill. Hornbills are a family of tropical near-passerine birds found in the Old World.
The African Grey Hornbill is a widespread and common resident breeder in much of sub-Saharan Africa and into Arabia.
This is a bird mainly of open woodland and savannah. The female lays two to four white eggs in a tree hollow, which is blocked off during incubation with a cement made of mud, droppings and fruit pulp. There is only one narrow aperture, just big enough for the male to transfer food to the mother and the chicks.
When the chicks and female outgrow the nest, the mother breaks out and rebuilds the wall, after which both parents feed the chicks.
This species is a large bird, at 45 cm in length, but is one of the smaller hornbills. It has mainly grey plumage, with the head, flight feathers and long tail being a darker shade. There is a white line down each side of the head and one on the back which is visible only in flight. The long curved bill is black and has a small casque and a creamy horizontal stripe.
The male has a black bill, whereas the female has red on the mandibles. The plumage of the male and female is similar. Immature birds are more uniformly grey. The flight is undulating. The similarly sized Red-billed Hornbill has uniformly grey plumage.
The African Grey Hornbill is omnivorous, taking insects, fruit and reptiles. It feeds mainly in trees.
This conspicuous bird advertises its presence with its piping pee-o pee-o pee-o call.

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