Sombre Nightjar vs Archbold's Nightjar

Monotonous churring trill; repetitive 'churr' at moderate tempo from East African scrub; lower-pitched and less musical than some relatives; calls persistently at night

Rarely recorded; presumed churring nocturnal song; low, resonant trilling typical of genus; vocalizations scarcely documented from highland New Guinea

Uniformly dark sooty-brown upperparts with dense blackish vermiculations; pale buff supercilium and narrow white submoustachial stripe; underparts barred buff and dark brown. Sexes similar.

Brown and dark grey with rufous-buff vermiculations; whitish throat patch; pale buff supercilium contrasts with darker crown; no white wing or tail patches; tail barred; New Guinea highlands; few records.