Brook Floater vs Laysanstockente

Alasmidonta varicosa compared with Anas laysanensis

Key Differences

• Brook Floater is Vulnerable while Laysanstockente is Critically Endangered.

Taxonomic Classification

Rank	Brook Floater	Laysanstockente
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum	Mollusca (Weichtiere)	Chordata (Chordatiere)
Class	Bivalvia (Muscheln)	Aves (Vögel)
Order	Unionida (Unionida)	Anseriformes (Gänsevögel)
Family	Unionidae	Anatidae
Genus	Alasmidonta	Anas
Species	Alasmidonta varicosa	Anas laysanensis

Evolutionary Relationship

Brook Floater and Laysanstockente share a common ancestor at the Kingdom level: Animalia. (Tier)

Conservation Status

Brook Floater

VU — Vulnerable

Laysanstockente

CR — Critically Endangered

Physical Characteristics

Attribute	Brook Floater	Laysanstockente
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.

Laysanstockente

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.

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.

Laysanstockente

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.