The black-and-white casqued hornbill is one of the defining birds of Uganda’s montane forests. Its large size, distinctive casqued bill, and resonant calls make it a dominant presence in the forest canopy. In Bwindi Impenetrable Forest this species is almost always heard before it is seen — the loud wing-whooshing of its wingbeats carries through the forest, announcing its approach from some distance.
This is one of the largest hornbills in Africa and one of the most spectacular forest birds you can see in Uganda in 2027. It is strongly associated with large fruiting trees and plays a vital role in seed dispersal within the Albertine Rift forests. For gorilla trekkers at Bwindi, it is a virtually guaranteed sighting.
Identification
The black-and-white casqued hornbill is a large bird reaching 70 to 80 centimetres. The plumage is black above and white below, with a long white-tipped tail. The bill is large, yellow to ivory, and bears a prominent casque — a ridge running along the top of the bill that gives the species its name. The bare facial skin is blue-purple. Males have a larger casque than females.
In flight the black and white pattern is striking and the noisy wingbeats are characteristic. The species flies with a distinctive undulating pattern through the forest. The loud wing noise — a series of whooshing sounds with each downstroke — is one of the most distinctive sounds of montane forest in Uganda and can be heard from considerable distances.
Forest Habitat and Distribution
The black-and-white casqued hornbill is found in montane and submontane forests of the Albertine Rift, including Bwindi Impenetrable Forest, Kibale National Park, Budongo Forest, and the forests of the Rwenzori foothills. It is a forest-dependent species that requires large trees with natural cavities for nesting.
The species is most abundant in primary forest with a high diversity of fruiting trees. In Bwindi it is present throughout the forest but concentrations build up at fruiting figs and other productive food sources. Groups of five to twenty birds are typical, though solitary birds and pairs are also seen.
Diet and Feeding
The black-and-white casqued hornbill feeds primarily on large fruits, particularly figs. The powerful bill can manipulate and swallow fruits that smaller birds cannot handle. Insects, lizards, and small snakes are also taken. The species plays a critical ecological role as a seed disperser — large seeds that pass through its digestive system are deposited throughout its range.
Groups move through the forest together, descending to productive fruiting trees and spending extended periods feeding before moving on. The calls at fruiting trees — loud, braying notes — attract other individuals and species. Mixed species flocks often gather at the same fruiting trees, creating excellent wildlife watching opportunities.
The Remarkable Nesting Behaviour
Like all hornbills, the black-and-white casqued hornbill has a unique nesting strategy. The female seals herself inside a tree cavity using mud, droppings, and food remains, leaving only a narrow slit through which the male passes food. She remains sealed inside for the entire incubation and early chick-rearing period — sometimes several months.
The male feeds the female and later the chicks through the slit. This behaviour protects the nesting female from predators, particularly tree-climbing snakes. When the chicks are large enough, the female breaks out and helps feed them. The chicks then reseal the cavity until they are ready to fledge. This extraordinary system requires large, structurally sound tree cavities found only in old-growth forest.
Conservation Importance
The black-and-white casqued hornbill is dependent on old-growth forest with large trees containing natural cavities. Logging and forest degradation remove both food sources and nesting sites. The protection of Bwindi Impenetrable Forest and other Ugandan montane forests is therefore critical for this and dozens of other forest-dependent species.
Gorilla tourism provides the primary economic justification for maintaining the forests that this hornbill requires. The income from $800 gorilla permits in 2027 funds forest protection that benefits not just gorillas but the entire forest ecosystem, including this spectacular species.
Photography Tips
The black-and-white casqued hornbill’s large size makes it easier to photograph than many forest birds. The challenge is the dark forest setting — a large aperture and high ISO are often necessary. Look for birds at fruiting trees where they spend extended periods feeding and may move into sunlit positions. The casque detail and blue facial skin are the key features to capture clearly.
See It on Your 2027 Uganda Gorilla Trek
The gorilla trekking permit costs $800 in 2027. The black-and-white casqued hornbill is one of the species you are almost certain to encounter during your gorilla trek in Bwindi. Its loud calls and conspicuous behaviour make it one of the most satisfying forest bird sightings of any Uganda safari. Contact us to plan your 2027 itinerary.
