Laysan Duck vs Swamp Dwarf Crayfish

Anas laysanensis compared with Cambarellus puer

Key Differences

• Laysan Duck is Critically Endangered while Swamp Dwarf Crayfish is Least Concern.

Taxonomic Classification

Rank	Laysan Duck	Swamp Dwarf Crayfish
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Aves (Birds)	Malacostraca (Crustaceans)
Order	Anseriformes (Anseriformes)	Decapoda (Decapoda)
Family	Anatidae	Cambaridae
Genus	Anas	Cambarellus
Species	Anas laysanensis	Cambarellus puer

Evolutionary Relationship

Laysan Duck and Swamp Dwarf Crayfish share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Laysan Duck

CR — Critically Endangered

Swamp Dwarf Crayfish

LC — Least Concern

Physical Characteristics

Attribute	Laysan Duck	Swamp Dwarf Crayfish
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.

Swamp Dwarf Crayfish

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Found in Norway.

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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway