Re: Noble Canyon whip-poor-will
The original observer heard it at 9pm on 4 May. The next night on 5 May, it was heard singing again at 9pm, but very distantly, and found to be down in the canyon. Last night, it was heard singing at 809pm, but those observers were down in the canyon on the trail at that time. So it appears it begins singing "on time" (not long after sunset) down in the better habitat, and only audible barely or later from the road or driveway. But to reiterate, the trail isn't easy in the dark and cell coverage is weak to non-existent.
Source: SanDiegoRegionBirding Latest Reports