The common English name “chuck-will’s-widow ” is an onomatopoeia from the bird’s song. Alternative names include “chuckwuts-widow” and “chip-fell-out-of-a-oak”.
This bird is sometimes confused with the better-known whippoorwill (Antrostomus vociferus), because of their similar calls and unusual names. Though rather closely related, they are two distinct species.
It is the largest nightjar or nighthawk in North America. In length, it ranges from 28 to 33 cm (11 to 13 in). The wingspan can range from 58 to 66 cm (23 to 26 in).
The repetitive song is often heard at night. It consists of a series of calls with a vibrating middle note between two shorter notes, not much shifting in pitch. It eats primarily insects, particularly those active at night such as moths, beetles, and winged ants. It will also eat small birds and bats, swallowing them whole.
Notice the feelers around the mouth on the cropped image. The primary term for the stiff, hair-like tactile bristles found around the mouth or base of the beak in many bird species is rictal bristles. These structures, often found in insectivorous and nocturnal birds, are sometimes referred to as facial bristles, vibrissae, or simply sensory bristles. (Unfortunately the bird was sleeping in a safe place covered by overgrowth making a clean image without overlying branches impossible as you can see with the green overlying the images.)
From Wikipedia






















































































































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