Bolivian red howler vs Chuck-will's-widow

Alouatta sara compared with Antrostomus carolinensis

Key Differences

• Bolivian red howler is Near Threatened while Chuck-will's-widow is Least Concern.

Taxonomic Classification

Rank	Bolivian red howler	Chuck-will's-widow
Kingdom same	Animalia (प्राणी)	Animalia (प्राणी)
Phylum same	Chordata (रज्जुकी)	Chordata (रज्जुकी)
Class	Mammalia (स्तनधारी)	Aves (पक्षी)
Order	Primates (नरवानर गण)	Caprimulgiformes (Caprimulgiformes)
Family	Atelidae	Caprimulgidae
Genus	Alouatta	Antrostomus
Species	Alouatta sara	Antrostomus carolinensis

Evolutionary Relationship

Bolivian red howler and Chuck-will's-widow share a common ancestor at the Phylum level: Chordata. (रज्जुकी)

Conservation Status

Bolivian red howler

NT — Near Threatened

Chuck-will's-widow

LC — Least Concern

Physical Characteristics

Attribute	Bolivian red howler	Chuck-will's-widow
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bolivian red howler

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Chuck-will's-widow

Habitat

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

Range

Distributed across Colombia, Norway, and Venezuela.

Bolivian red howler

The Bolivian red howler (Alouatta sara) is a species in the genus Alouatta. It is currently classified as Near Threatened on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

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.