Blacknose shark vs Chuck-will's-widow

Carcharhinus acronotus compared with Antrostomus carolinensis

Key Differences

• Blacknose shark is Endangered while Chuck-will's-widow is Least Concern.

Taxonomic Classification

Rank	Blacknose shark	Chuck-will's-widow
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Chondrichthyes (Cartilaginous Fish)	Aves (Birds)
Order	Carcharhiniformes (Ground Sharks)	Caprimulgiformes (Caprimulgiformes)
Family	Carcharhinidae	Caprimulgidae
Genus	Carcharhinus	Antrostomus
Species	Carcharhinus acronotus	Antrostomus carolinensis

Evolutionary Relationship

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

Conservation Status

Blacknose shark

EN — Endangered

Chuck-will's-widow

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Blacknose shark

Habitat

Typically found in marine environments from coastal waters to deep ocean.

Range

Found in Venezuela. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Chuck-will's-widow

Habitat

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

Range

Distributed across Colombia, Norway, and Venezuela.

Blacknose shark

The Blacknose shark (Carcharhinus acronotus) is a species in the genus Carcharhinus. It is currently classified as Endangered on the IUCN Red List. Typically found in marine environments from coastal waters to deep ocean.

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.

Shared Countries

Both species can be found in 1 countries:

🇻🇪 Venezuela