arran brown vs Brook Floater

Erebia ligea compared with Alasmidonta varicosa

Key Differences

• arran brown is Least Concern while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	arran brown	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Bivalvia (Bivalvia)
Order	Lepidoptera (Butterflies & Moths)	Unionida (Unionida)
Family	Nymphalidae (Brush-footed Butterflies)	Unionidae
Genus	Erebia	Alasmidonta
Species	Erebia ligea	Alasmidonta varicosa

Evolutionary Relationship

arran brown and Brook Floater share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

arran brown

LC — Least Concern

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	arran brown	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

arran brown

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (33 countries).

Brook Floater

Habitat

Native to North America, inhabiting ecosystems characteristic of the region.

Range

Found in United States. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

arran brown

arran brown (Erebia ligea) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Brook Floater

The Brook Floater (Alasmidonta varicosa) is a species in the genus Alasmidonta. It is currently classified as Vulnerable on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.