Black-Based Cluster Fly vs Brook Floater

Pollenia labialis compared with Alasmidonta varicosa

Key Differences

• Black-Based Cluster Fly is Least Concern while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Black-Based Cluster Fly	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Bivalvia (Bivalvia)
Order	Diptera (Diptera)	Unionida (Unionida)
Family	Polleniidae	Unionidae
Genus	Pollenia	Alasmidonta
Species	Pollenia labialis	Alasmidonta varicosa

Evolutionary Relationship

Black-Based Cluster Fly and Brook Floater share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Black-Based Cluster Fly

LC — Least Concern

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Black-Based Cluster Fly	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Black-Based Cluster Fly

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Denmark, Norway, Sweden, and United States.

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.

Black-Based Cluster Fly

The Black-Based Cluster Fly (Pollenia labialis) is a species in the genus Pollenia. It is currently classified as Least Concern on the IUCN Red List. Typically found in virtually all terrestrial and freshwater habitats.

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