Distribution in the Americas
Dusky Nightjar is resident in the highlands of Costa Rica and western Panama. This nightjar is widely distributed in Costa Rica (Stiles and Skutch 1989), but in Panama it is confined to Volcán Barú in Chiriquí (Wetmore 1968, Ridgely and Gwynne 1989).
The elevational range of Dusky Nightjar is 1500-3100 m (Parker et al. 1996).
Dusky Nightjar occurs in humid montane forest, but generally occupies forest edge and openings in the forest, not the interior of closed forest; representative sites where it occurs include "the páramon-forest transition, highland pastures with scattered tall trees, and gaps" (Stiles and Skutch 1989).