Circular Ear Shell vs Eurasian Skylark

Haliotis cyclobates compared with Alauda arvensis

Key Differences

• Circular Ear Shell is Least Concern while Eurasian Skylark is Vulnerable.

Taxonomic Classification

Rank	Circular Ear Shell	Eurasian Skylark
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Gastropoda (Gastropoda)	Aves (Birds)
Order	Lepetellida (Lepetellida)	Passeriformes (Songbirds)
Family	Haliotidae	Alaudidae
Genus	Haliotis	Alauda
Species	Haliotis cyclobates	Alauda arvensis

Evolutionary Relationship

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

Conservation Status

Circular Ear Shell

LC — Least Concern

Eurasian Skylark

VU — Vulnerable

Physical Characteristics

Attribute	Circular Ear Shell	Eurasian Skylark
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.

Eurasian Skylark

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, tundra, and tropical and subtropical moist broadleaf forests spanning the Australasia and Oceanian realms.

Range

Widely distributed across Europe (5 countries), North America (Canada, United States), and Oceania and the Pacific (Australia, New Zealand). Currently classified as Vulnerable 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.

Eurasian Skylark

Celebrated across European literature and poetry for its complex, melodious song sung on the wing during spectacular display flights, Eurasian skylarks soar vertically hundreds of meters above open farmland, grassland, and heathland across Europe and Asia while producing an uninterrupted torrent of song lasting up to an hour. Males can produce over 700 distinct song phrases. Once enormously abundant across European farmland, skylark populations have declined over 70% since 1970 due to agricultural intensification.