Brook Floater vs Nimblewill

Alasmidonta varicosa compared with Muhlenbergia schreberi

Key Differences

• Brook Floater is Vulnerable while Nimblewill is Not Evaluated.

Taxonomic Classification

Rank	Brook Floater	Nimblewill
Kingdom	Animalia (Animals)	Plantae (Plants)
Phylum	Mollusca (Mollusks)	Magnoliophyta (Flowering Plants)
Class	Bivalvia (Bivalvia)	Liliopsida (Monocots)
Order	Unionida (Unionida)	Poales (Grasses)
Family	Unionidae	Poaceae (Grass Family)
Genus	Alasmidonta	Muhlenbergia
Species	Alasmidonta varicosa	Muhlenbergia schreberi

Conservation Status

Brook Floater

VU — Vulnerable

Nimblewill

NE — Not Evaluated

Physical Characteristics

Attribute	Brook Floater	Nimblewill
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.

Nimblewill

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Widely distributed across Asia (Georgia, Japan), Europe (4 countries), North America (Canada, United States), and South America (Brazil).

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.

Shared Countries

Both species can be found in 1 countries:

🇺🇸 United States