Chuck-will's-widow vs Variable Bluet

Antrostomus carolinensis compared with Coenagrion pulchellum

Key Differences

• Chuck-will's-widow is Least Concern while Variable Bluet is Endangered.

Taxonomic Classification

Rank	Chuck-will's-widow	Variable Bluet
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Arthropoda (สัตว์ขาปล้อง)
Class	Aves (นก)	Insecta (แมลง)
Order	Caprimulgiformes (Caprimulgiformes)	Odonata (Odonata)
Family	Caprimulgidae	Coenagrionidae
Genus	Antrostomus	Coenagrion
Species	Antrostomus carolinensis	Coenagrion pulchellum

Evolutionary Relationship

Chuck-will's-widow and Variable Bluet share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

Chuck-will's-widow

LC — Least Concern

Variable Bluet

EN — Endangered

Physical Characteristics

Attribute	Chuck-will's-widow	Variable Bluet
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.

Variable Bluet

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Luxembourg, Norway, and Sweden. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Variable Bluet

Variable Bluet (Coenagrion pulchellum) is classified as Endangered (EN) on the IUCN Red List. At high risk of extinction in the wild, with significant population decline and ongoing threats to survival.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway