Kew's Chthonid vs Laysan Duck

Ephippiochthonius kewi compared with Anas laysanensis

Key Differences

• Kew's Chthonid is Not Evaluated while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Kew's Chthonid	Laysan Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Arachnida (Arachnids)	Aves (Birds)
Order	Pseudoscorpiones	Anseriformes (Anseriformes)
Family	Chthoniidae	Anatidae
Genus	Ephippiochthonius	Anas
Species	Ephippiochthonius kewi	Anas laysanensis

Evolutionary Relationship

Kew's Chthonid and Laysan Duck share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Kew's Chthonid

NE — Not Evaluated

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Kew's Chthonid	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Kew's Chthonid

Habitat

Typically found in terrestrial habitats from forests to deserts.

Range

Found in Denmark.

Laysan Duck

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and Mediterranean forests and woodlands within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Distributed across Belgium, France, Netherlands, Norway, and United Kingdom. Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Laysan Duck

Laysan Duck (Anas laysanensis) is classified as Critically Endangered (CR) on the IUCN Red List. Facing an extremely high risk of extinction in the wild due to severe population decline and habitat loss.