Introduction
Bates’s Nightjar (Caprimulgus batesi) is a secretive nightjar of the Congo Basin and adjacent Central African forests. It belongs to the family Caprimulgidae and is active mainly at dusk and during the night. Its dark, mottled plumage provides effective camouflage when it is roosting on the ground or on a low perch. The species was named after the naturalist and collector George Latimer Bates. (worldbirdnames.com)
Physical Description
Bates’s Nightjar is a relatively large, dark nightjar, measuring approximately 29–31 cm in length and weighing about 89–112 g. It has a large-looking head, a long tail and broad, pointed wings.
The upperparts and wing coverts are dark brown, marked with black and buff streaks and spots. A buff collar on the hindneck is usually indistinct, although it can be more noticeable in some individuals. The underparts are blackish brown with buff speckling on the breast and darker barring towards the belly. The throat is whitish.
Sexual differences are most evident in flight. Males generally show a small white spot towards the wingtip and white tips to the two outer tail feathers. Females are usually paler and lack, or have less conspicuous, white markings on the wings and outer tail. No well-established age-related plumage differences are normally used for field identification.
Range and Habitat
Bates’s Nightjar has a fragmented distribution in the Congo Basin and neighbouring parts of Central Africa. Its range extends from southern Cameroon through Gabon and the Republic of the Congo to parts of the Democratic Republic of the Congo, with records also reaching eastern Uganda. The species is a resident of this region rather than a known long-distance migrant. (avibase.bsc-eoc.org)
It occurs mainly in lowland primary rainforest, particularly around clearings, forest edges, riverine forest and flooded forest. It may also use secondary forest and plantations close to intact rainforest. Some accounts report that it can be locally encountered near rivers, paths and other open areas within otherwise heavily forested landscapes. (en.wikipedia.org)
The species is difficult to survey because suitable habitat is dense, its activity is largely nocturnal and its distribution is discontinuous. Reliable information on elevation, local abundance and geographic variation remains limited.
Behaviour and Diet
Bates’s Nightjar is crepuscular and nocturnal. During daylight it roosts on the ground, on forest paths or in clearings, or several metres above the ground on a liana or low perch. Its cryptic plumage helps it remain inconspicuous while resting.
It feeds on flying and mobile invertebrates, including moths, beetles, mantises, crickets and grasshoppers. Foraging takes place over forest edges, clearings, riverine vegetation and sometimes within or above the forest canopy. Like other nightjars, it catches prey with a wide, deeply gaping mouth during short flights from a perch or while moving through the air. (en.wikipedia.org)
Breeding information is incomplete. The species does not construct a conventional nest. A single egg is laid directly on bare ground or among leaf litter, sometimes on a path or trail. Records indicate breeding in December and January in Gabon, while breeding may occur at other times of year in the Democratic Republic of the Congo. These observations should be treated as incomplete rather than as a full description of the species’ breeding calendar. (en.wikipedia.org)
Identification Tips
Look for the following combination of features when identifying Bates’s Nightjar:
- A large, dark nightjar with a long tail and broad pointed wings.
- Heavily mottled dark-brown upperparts with black and buff markings.
- A generally indistinct buff hindneck collar.
- A whitish throat contrasting with darker, buff-speckled underparts.
- Association with lowland rainforest edges, clearings, riverine forest and paths.
- A distinctive nocturnal call, described in field accounts as a loud opening note followed by a repeated series of notes.
In flight, a male may show a small white wing spot and white tips to the outer tail feathers. A female is generally paler and lacks these markings or shows them less clearly. Identification is most reliable when plumage, habitat, call and behaviour are considered together, because other dark nightjars may occur in the same broad region.
Conservation Status
Bates’s Nightjar is currently classified as Least Concern. Its distribution is broad, although fragmented, and the available information does not provide a reliable global population estimate. A precise population trend should therefore not be assumed. (worldbirdnames.com)
The species depends largely on forest habitats, particularly mature lowland rainforest and associated clearings, edges and riverine vegetation. Logging, agricultural expansion, infrastructure development and the resulting fragmentation may reduce or degrade suitable habitat in parts of its range. Protecting large areas of intact Congo Basin forest, maintaining forest connectivity and improving nocturnal survey coverage are appropriate conservation priorities.
Frequently Asked Questions
Where does Bates’s Nightjar live?
It occurs in the Congo Basin and adjacent Central African forests, including southern Cameroon, Gabon, the Republic of the Congo, the Democratic Republic of the Congo and parts of western Uganda.
Is Bates’s Nightjar migratory?
It is generally regarded as a resident species. There is no well-established evidence that it undertakes long-distance seasonal migration.
What does Bates’s Nightjar eat?
Its diet consists mainly of insects and other flying or mobile invertebrates, including moths, beetles, mantises, crickets and grasshoppers.
Where does Bates’s Nightjar nest?
It does not build a conventional nest. A single egg is laid directly on bare ground or among leaf litter, sometimes on a forest path or trail.
How can Bates’s Nightjar be identified?
It is recognised by its large, dark appearance, mottled brown plumage, long tail, pale throat and association with lowland rainforest edges and clearings. Males may show small white wing and outer-tail markings in flight.
Is Bates’s Nightjar endangered?
The species is currently listed as Least Concern. Nevertheless, habitat loss and forest fragmentation may affect local populations, and its ecology and population trend remain poorly documented.
References
- BirdLife International. 2016. Caprimulgus batesi. BirdLife International species assessment and global bird checklist. BirdLife International. https://datazone.birdlife.org/ (accessed 8 September 2026).
- Cleere, N. 2010. Nightjars: A Guide to Nightjars and Related Nightbirds. Pica Press.
- International Ornithologists’ Union. 2026. IOC World Bird List, version 15.2. International Ornithologists’ Union. https://www.worldbirdnames.org/ (accessed 8 September 2026).
- Sharpe, R. B. 1906. Description of Caprimulgus batesi. Bulletin of the British Ornithologists’ Club, 19: 18.
- The Trust for Avian Systematics. n.d. H&M4 Checklist, Caprimulgidae. The Trust for Avian Systematics. https://www.aviansystematics.org/checklist?viewfamilies=76 (accessed 8 September 2026).
- World Bird Names. n.d. Bates’s Nightjar, Caprimulgus batesi. World Bird Names. https://www.worldbirdnames.com/bird/bates-s-nightjar/3726.html (accessed 8 September 2026).
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