Grey Hornbill (Tockus nasutus)
Bare parts: iris brown to red-brown; bill black, cream wedge-shaped patch on upper jaw, diagonal white ridges on lower jaw, tip of upper jaw reddish, base creamy yellow, tip of lower jaw reddish, rest black with diagonal white ridges; gular skin dark grey, light green; legs and feet black, soles white. Generally dull greyish above and on throat and breast; rest of underparts whitish; tail brownish, tipped white.
High-pitched whistled call, starting off with a few lower notes, woop-woop-woop, weep-weep-weep-weep, weep-weep, weep-weep, etc.; whistles sometimes interspersed with clicking sounds; often calls in chorus.
Bushveld, savannah, woodland.
Common resident, in South Africa absent from most of the highveld, Natal, Cape, southern Namibia and treeless Kalahari Sandveld.
In pairs when breeding; otherwise gregarious in small groups or large dry-season concentrations of 100 or more birds. Forages in trees, rarely on ground; hawks insects in flight.
Flight undulating, bouyant and dextrous; tail raised on alighting. Frequents grassfires. When calling, flaps wings and points bill upwards.
Insects, solifugids, rodents, frogs, chameleons, seeds, fruit, peanuts.
Season: Usually October to November. Nests: Natural hole in tree trunks.
Incubation and fledging: Clutch: 3-5 white eggs. Incubation: 24-26 days by females only. Nestling: 43-49 days.
References: Gordon Lindsay Maclean: Roberts' Birds of Southern Africa, Sixth Edition. 1993.
Kenneth Newman: Newman's Birds by Colour. 2000
Photographed by Gavin Orbell and Eric Stockenstroom