Bog Hoverfly vs Brook Floater

Eristalis cryptarum compared with Alasmidonta varicosa

Key Differences

• Bog Hoverfly is Extinct while Brook Floater is Vulnerable.

Taxonomic Classification

Rank	Bog Hoverfly	Brook Floater
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Mollusca (Mollusks)
Class	Insecta (Insects)	Bivalvia (Bivalvia)
Order	Diptera (Diptera)	Unionida (Unionida)
Family	Syrphidae	Unionidae
Genus	Eristalis	Alasmidonta
Species	Eristalis cryptarum	Alasmidonta varicosa

Evolutionary Relationship

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

Conservation Status

Bog Hoverfly

EX — Extinct

Brook Floater

VU — Vulnerable

Physical Characteristics

Attribute	Bog Hoverfly	Brook Floater
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bog Hoverfly

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

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.

Bog Hoverfly

The Bog Hoverfly (Eristalis cryptarum) is a species in the genus Eristalis. It is currently classified as Extinct on the IUCN Red List. Distributed across Belgium, Denmark, Norway, and Sweden.

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.