Laysan Duck vs Rust Colored Crab

Anas laysanensis compared with Geothelphusa ferruginea

Key Differences

• Laysan Duck is Critically Endangered while Rust Colored Crab is Data Deficient.

Taxonomic Classification

Rank	Laysan Duck	Rust Colored Crab
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Aves (Birds)	Malacostraca (Crustaceans)
Order	Anseriformes (Anseriformes)	Decapoda (Decapoda)
Family	Anatidae	Potamidae
Genus	Anas	Geothelphusa
Species	Anas laysanensis	Geothelphusa ferruginea

Evolutionary Relationship

Laysan Duck and Rust Colored Crab share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Laysan Duck

CR — Critically Endangered

Rust Colored Crab

DD — Data Deficient

Physical Characteristics

Attribute	Laysan Duck	Rust Colored Crab
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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.

Rust Colored Crab

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Found in Taiwan.

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.