Introduction
The Blue Malkoha, also known as the Chattering Yellowbill, is a secretive African cuckoo in the family Cuculidae. Its accepted scientific name is Ceuthmochares aereus. It is best known for its heavy yellow bill, greyish head and underparts, glossy blue-green upperparts and long, white-tipped tail. Unlike many cuckoos, it builds its own nest and raises its young.
Physical Description
The Blue Malkoha is a medium-sized bird, measuring approximately 35–40 centimetres in length. It has a long, graduated tail, dark wings and back with a blue, green or blue-green gloss, and conspicuous pale or white tips to the tail feathers.
The head, throat and underparts are generally greyish, contrasting with the darker, more iridescent upperparts. Its large, slightly curved bill is yellow and is one of the most useful field marks. Bare skin around the eye may show reddish tones. Plumage colour varies geographically, and the western and central African forms are not always equally blue or green in appearance.
There is no well-established, conspicuous difference between adult males and females. Juveniles are less vividly coloured and may have duller plumage and less strongly contrasting tail markings.
Range and Habitat
The Blue Malkoha is resident in tropical Africa. Its range extends through parts of the Upper Guinea forests of West Africa and eastwards through the central African forest belt, with records continuing into western Uganda. It is associated mainly with humid lowland and lower-elevation forests, riverine forest, forest edges, dense secondary growth and tangled woodland.
The species usually keeps to dense vegetation in the understorey and lower or middle levels of the forest. It is not a long-distance migrant, although local movements may occur in response to food availability and seasonal conditions. The Blue Malkoha was formerly treated together with the Green Malkoha, Ceuthmochares australis, under the broader name Yellowbill. These are now generally recognised as separate species.
Where to See This Species
Kakum National Park, Central Region, Ghana
Kakum is a well-documented location for Blue Malkoha in Ghana. The species has been recorded in the park’s mature rainforest and along forest trails, including the canopy-walkway area. Dense foliage, forest edges and quiet observation points are the most suitable places to search. It may be easier to detect by its calls than by sight.
Nearby accommodation: Cape Coast and the surrounding Kakum gateway area offer hotels, guest houses, lodges and other visitor accommodation.
Ankasa Conservation Area, Western Region, Ghana
Blue Malkoha has been recorded in Ankasa’s wet evergreen forest. The area’s extensive forest cover and tangled vegetation provide suitable habitat, although the species remains unobtrusive and may be heard more often than seen. Local birding records include both heard and observed birds.
Nearby accommodation: Axim is the most practical recognised gateway for accommodation, with hotels, guest houses and lodges serving visitors to the western coastal forests.
Kibale National Park, Western Region, Uganda
Kibale supports humid forest habitat suitable for Blue Malkoha, and the species is included in local park bird checklists and biodiversity records. Forest trails around the Kanyanchu area and other densely vegetated sections offer realistic opportunities, particularly with an experienced bird guide.
Nearby accommodation: Fort Portal and the Kibale forest gateway settlements provide lodges, guest houses, camps and other visitor accommodation.
Behaviour and Diet
The Blue Malkoha is primarily diurnal and usually moves quietly through dense vegetation. It is often solitary or seen in pairs, and its secretive behaviour makes it easy to overlook even where it is locally regular. It may climb and hop along branches while searching leaves, twigs and tangled growth for prey.
Its diet is chiefly animal-based and includes caterpillars, beetles, grasshoppers, crickets and other invertebrates. Small frogs and other soft-bodied prey have also been reported. Fruit, seeds and leaves may be taken occasionally, but the available evidence does not support describing the species as primarily frugivorous.
The Blue Malkoha is not a brood parasite. It constructs a rough platform nest from twigs and plant material, usually concealed in dense vegetation a few metres above the ground. A small clutch, commonly reported as two pale eggs, is laid. Both adults are involved in caring for the young, although the breeding biology of the species remains incompletely documented.
Identification Tips
- Look for a medium-sized, long-tailed cuckoo moving through dense forest vegetation.
- The combination of a heavy yellow bill, grey head and underparts, glossy blue-green upperparts and white-tipped tail feathers is distinctive.
- The bird is usually seen briefly, often climbing through foliage rather than sitting in the open.
- Listen carefully in humid forest, as calls may reveal a bird that remains hidden.
- Do not confuse it with the Green Malkoha, Ceuthmochares australis. The Green Malkoha occupies mainly eastern and southern Africa, while the Blue Malkoha is primarily a West and Central African species, although their historical treatment as one species has caused confusion in older records.
Conservation Status
The Blue Malkoha is currently assessed as Least Concern. It has a broad African distribution and is not regarded as globally threatened at present. A precise global population estimate and a reliable overall population trend are not available.
The principal concern is the loss and fragmentation of humid forest through logging, agricultural expansion, fuelwood collection and other forms of habitat conversion. Maintaining large forest blocks, protecting forest edges and improving the management of protected areas are important measures for the species and for the wider forest community on which it depends.
Frequently Asked Questions
Where is the Blue Malkoha found?
The Blue Malkoha occurs in tropical Africa, mainly in humid forests from the Upper Guinea region of West Africa through the central African forest belt and into parts of western Uganda.
What does the Blue Malkoha look like?
It is a medium-sized cuckoo with a greyish head and underparts, glossy blue-green upperparts, a large yellow bill and a long tail marked with pale or white tips.
Is the Blue Malkoha a brood parasite?
No. Unlike many cuckoos, the Blue Malkoha builds its own nest and both adults help care for the young.
What does the Blue Malkoha eat?
It mainly eats insects and other invertebrates, including caterpillars, beetles, grasshoppers and crickets. Small frogs and occasional plant foods may also be taken.
Is the Blue Malkoha endangered?
No. It is currently classified as Least Concern, although habitat loss and forest fragmentation remain important local threats.
Where is a good place to see a Blue Malkoha?
Kakum National Park and Ankasa Conservation Area in Ghana, and Kibale National Park in Uganda, are documented wildlife-viewing locations where the species may be found in suitable forest habitat.
References
- IOC World Bird List
- BirdLife International
- African Bird Club
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