Chuck-will's-widow vs Ghost shark

Antrostomus carolinensis compared with Hydrolagus mitsukurii

Key Differences

• Chuck-will's-widow is Least Concern while Ghost shark is Near Threatened.

Taxonomic Classification

Rank	Chuck-will's-widow	Ghost shark
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Holocephali (Holocephali)
Order	Caprimulgiformes (Caprimulgiformes)	Chimaeriformes (Chimaeriformes)
Family	Caprimulgidae	Chimaeridae
Genus	Antrostomus	Hydrolagus
Species	Antrostomus carolinensis	Hydrolagus mitsukurii

Evolutionary Relationship

Chuck-will's-widow and Ghost shark share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Chuck-will's-widow

LC — Least Concern

Ghost shark

NT — Near Threatened

Physical Characteristics

Attribute	Chuck-will's-widow	Ghost shark
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Chuck-will's-widow

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Colombia, Norway, and Venezuela.

Ghost shark

Habitat

Native to Asia, inhabiting ecosystems characteristic of the region.

Range

Found in Taiwan. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Chuck-will's-widow

The Chuck-will's-widow (Antrostomus carolinensis) is the largest nightjar in North America, named for its distinctive far-carrying call — a resonant four-syllable whistle repeated persistently on warm nights. It breeds across the southeastern United States, from the Atlantic coastal plain through the Gulf states and up the Mississippi Valley to southern Indiana and Kansas. The species migrates southward in autumn to winter quarters in the Caribbean, Central America, and northern South America. Like all nightjars, it is a crepuscular and nocturnal insectivore, capturing large moths, beetles, and other flying insects in flight using its enormous, bristle-fringed gape. By day, the Chuck-will's-widow roosts on the ground or along horizontal branches, relying on cryptic mottled plumage for concealment. It nests directly on the leaf litter of open woodland and scrub, typically in pine-oak forests, dry forests, and woodland edges. The IUCN classifies this species as Least Concern, though Breeding Bird Survey data suggest moderate long-term population declines linked to forest fragmentation and light pollution that disrupts insect prey availability. Conservation of large-scale woodland tracts in the southeastern United States benefits this species and its associated nightjar community.