Brook Floater vs Double-crested Cormorant

Alasmidonta varicosa compared with Phalacrocorax auritus

Key Differences

• Brook Floater is Vulnerable while Double-crested Cormorant is Least Concern.

Taxonomic Classification

Rank	Brook Floater	Double-crested Cormorant
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Mollusca (Mollusks)	Chordata (Chordates)
Class	Bivalvia (Bivalvia)	Aves (Birds)
Order	Unionida (Unionida)	Suliformes (Suliformes)
Family	Unionidae	Phalacrocoracidae
Genus	Alasmidonta	Phalacrocorax
Species	Alasmidonta varicosa	Phalacrocorax auritus

Evolutionary Relationship

Brook Floater and Double-crested Cormorant share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Brook Floater

VU — Vulnerable

Double-crested Cormorant

LC — Least Concern

Physical Characteristics

Attribute	Brook Floater	Double-crested Cormorant
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

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.

Double-crested Cormorant

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Widely distributed across Europe (5 countries), North America (United States), and South America (Colombia).

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.

Double-crested Cormorant

Double-crested Cormorant (Phalacrocorax auritus) 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.

Shared Countries

Both species can be found in 1 countries:

🇺🇸 United States