Eastern Whip-poor-will Overview, All About Birds, Cornell Lab of Ornithology

Eastern Whip-poor-wills lay their eggs in phase with the lunar cycle, so that they hatch on average 10 days before a full moon. When the moon is near full, the adults can forage the entire night and capture large quantities of insects to feed to their nestlings.

Eastern Whip-poor-will chicks move around as nestlings, making it difficult for predators to rob the nest. The parent may help by shoving a nestling aside with its foot, sometimes sending the young bird tumbling head over heels.

The male Eastern Whip-poor-will often will investigate intruders near the nest by hovering in place with his body nearly vertical and his tail spread wide, showing off the broad white tips of the tail feathers.

Eastern and Mexican Whip-poor-wills used to be considered one species, simply called the Whip-poor-will. But in 2010 they were split into two species based on differences in mitochondrial and nuclear DNA. Eastern Whip-poor-wills give faster, higher-pitched whip-poor-will calls and have more colorful eggs than their western counterparts.

The Eastern Whip-poor-will may locate insects by seeing the bugs’ silhouettes against the sky. Its eyes have a reflective structure behind the retina that is probably an adaptation to low light conditions.

In the wild, Eastern Whip-poor-wills have been known to live 13 to 15 years.

Basic Description

Other Names