Birdsong field guide
Gray Nightjar
Caprimulgus jotaka
A medium-sized, nocturnal bird of East and Southeast Asia, characterized by its remarkable cryptic plumage and rhythmic, mechanical vocalizations.
What it sounds like
A rapid, repetitive, and loud series of mechanical 'tock-tock-tock-tock' notes, resembling a hammer striking wood.
Field notes
- Possesses highly specialized plumage that mimics leaf litter and tree bark, providing near-perfect camouflage during the day.
- Exhibits sexual dimorphism where males feature prominent white patches on the wings and tail, while these markings are buff-colored or absent in females.
- An aerial insectivore that uses its massive gape and specialized rictal bristles to scoop up moths and beetles mid-flight.
- Unlike many resident tropical nightjars, northern populations of this species are migratory, wintering as far south as the Greater Sundas.
- Its large eyes contain a tapetum lucidum, a reflective layer that enhances night vision and produces a distinct 'eyeshine' when caught in light.
Habitat
Mixed forests, coniferous woodlands, forest edges, and scrubby hillsides.
Range
Breeds in East Asia (Siberia, China, Japan, Korea); winters in Southeast Asia, including Indonesia and the Philippines.
Similar & commonly confused birds
Andaman NightjarCaprimulgus andamanicusBates's NightjarCaprimulgus batesiBonaparte's NightjarCaprimulgus concretusChirruping NightjarCaprimulgus griseatusDonaldson Smith's NightjarCaprimulgus donaldsoniEgyptian NightjarCaprimulgus aegyptiusEurasian NightjarCaprimulgus europaeusFiery-necked NightjarCaprimulgus pectoralis
Heard a Gray Nightjar?
Open Birdsong, tap record, and identify the bird singing near you in seconds — then collect it in your field journal.
Identify a bird by its song