チャックウィルヨタカ vs Grayling

Antrostomus carolinensis compared with Hipparchia semele

Key Differences

• チャックウィルヨタカ is Least Concern while Grayling is Endangered.

Taxonomic Classification

Rank	チャックウィルヨタカ	Grayling
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Chordata (脊索動物)	Arthropoda (節足動物)
Class	Aves (鳥類)	Insecta (昆虫)
Order	Caprimulgiformes (ヨタカ目)	Lepidoptera (チョウ目)
Family	Caprimulgidae	Nymphalidae (Brush-footed Butterflies)
Genus	Antrostomus	Hipparchia
Species	Antrostomus carolinensis	Hipparchia semele

Evolutionary Relationship

チャックウィルヨタカ and Grayling share a common ancestor at the Kingdom level: Animalia. (動物)

Conservation Status

チャックウィルヨタカ

LC — Least Concern

Grayling

EN — Endangered

Physical Characteristics

Attribute	チャックウィルヨタカ	Grayling
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

チャックウィルヨタカ

Habitat

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

Range

Distributed across Colombia, Norway, and Venezuela.

Grayling

Habitat

Inhabits temperate broadleaf and mixed forests and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found across Europe (37 countries). Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

チャックウィルヨタカ

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.

Grayling

グレイリング（Hipparchia semele）はIUCNレッドリストで絶滅危惧種（EN）に分類されています。野生個体群が著しく減少しており、生存への継続的な脅威により絶滅リスクが高い状況です。

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway