Circular Ear Shell vs Laysan Duck

Haliotis cyclobates compared with Anas laysanensis

Key Differences

• Circular Ear Shell is Least Concern while Laysan Duck is Critically Endangered.

Taxonomic Classification

Rank	Circular Ear Shell	Laysan Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Gastropoda (Gastropoda)	Aves (Birds)
Order	Lepetellida (Lepetellida)	Anseriformes (Anseriformes)
Family	Haliotidae	Anatidae
Genus	Haliotis	Anas
Species	Haliotis cyclobates	Anas laysanensis

Evolutionary Relationship

Circular Ear Shell and Laysan Duck share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Circular Ear Shell

LC — Least Concern

Laysan Duck

CR — Critically Endangered

Physical Characteristics

Attribute	Circular Ear Shell	Laysan Duck
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Circular Ear Shell

Habitat

Typically found in terrestrial and aquatic habitats including forests and freshwater.

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.

Circular Ear Shell

The Circular Ear Shell (Haliotis cyclobates) is a species in the genus Haliotis. It is currently classified as Least Concern on the IUCN Red List. Typically found in terrestrial and aquatic habitats including forests and freshwater.

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.