Timor Nightjar vs Heinrich's Nightjar

Poorly documented; presumed churring calls similar to Large-tailed Nightjar complex; vocalizations from Timor essentially unrecorded; calls at dusk from scrub

Haunting, hollow 'ku-WOO' repeated rhythmically; deep resonant quality; distinctive mournful whistle carrying through Sulawesi forest at night

Dark sooty-brown upperparts densely patterned with blackish streaks and pale buff spots; whitish throat band; underparts buff with dark brown barring; restricted to Timor with limited information on plumage variation.

Rufous-brown and dark brown mottled with buff vermiculations; large pale buff throat patch; pale buff supercilium; no white wing markings; tail darkly barred brown and buff. Poorly known; Sulawesi endemic.