Monteiro's hornbill (Tockus monteiri) is a species of hornbill found in arid and semi-arid environments of southwestern Africa. It is endemic to northwestern Namibia and southwestern Angola, where it is a distinctive and characteristic bird of rocky hillsides, dry riverbeds, and thorn scrub.
Description
Monteiro's hornbill is a relatively small hornbill, typically measuring about 54–58 cm (21–23 in) in length. Its plumage is predominantly black on the upperparts, wings, and breast, contrasting sharply with white underparts, a white lower back, and white outer tail feathers. A notable feature is a prominent white stripe running down the back of the neck. The bill is long, slender, and strongly decurved, typically yellowish to creamy with a reddish tip, lacking a large casque (the bony outgrowth on top of the bill) found in many other hornbill species; males may have a very small, barely noticeable casque. The bare skin around the eye is a distinctive reddish or pinkish-red. Females are generally smaller than males and have a slightly smaller bill.
Distribution and Habitat
This species has a restricted range, being found exclusively in the dry and desolate landscapes of northwestern Namibia and southwestern Angola. It inhabits savannas, Mopane woodland, thornveld, rocky gorges, and areas with sparse vegetation, often close to dry riverbeds. Its ability to thrive in such arid conditions is a testament to its adaptation to harsh desert environments.
Diet
Monteiro's hornbill is an opportunistic omnivore, with its diet varying seasonally. It primarily feeds on insects and other invertebrates, including grasshoppers, beetles, termites, and scorpions, which it often forages for on the ground. It will also consume small reptiles, such as lizards and geckos. During certain times of the year, its diet is supplemented with fruits and seeds, particularly those of local succulent plants and acacia species.
Behavior and Reproduction
Monteiro's hornbills are generally observed singly or in pairs. They are monogamous and territorial during the breeding season. Like other hornbills, they employ a unique nesting strategy where the female seals herself into a tree cavity or rock crevice using a plaster of mud, droppings, and food remains, leaving only a narrow slit through which the male passes food. This protects the female and eggs from predators. The female typically lays 3 to 5 white eggs. She undergoes a complete moult of her flight feathers during this period. The male is solely responsible for feeding the female and the chicks during incubation and the initial chick-rearing phase. Once the chicks are larger, the female breaks out of the nest, and both parents then feed the young until they fledge.
Conservation Status
The Monteiro's hornbill is classified as "Least Concern" by the International Union for Conservation of Nature (IUCN). While its range is somewhat restricted, its population appears to be stable within its preferred arid habitats, and it does not face any immediate significant threats.