Black-Based Cluster Fly vs Eurasian beaver

Pollenia labialis compared with Castor fiber

Key Differences

• Black-Based Cluster Fly is Least Concern while Eurasian beaver is Vulnerable.

Taxonomic Classification

Rank	Black-Based Cluster Fly	Eurasian beaver
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Arthropoda (Arthropods)	Chordata (Chordates)
Class	Insecta (Insects)	Mammalia (Mammals)
Order	Diptera (Diptera)	Rodentia (Rodents)
Family	Polleniidae	Castoridae (Beavers)
Genus	Pollenia	Castor (Beavers)
Species	Pollenia labialis	Castor fiber

Evolutionary Relationship

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

Conservation Status

Black-Based Cluster Fly

LC — Least Concern

Eurasian beaver

VU — Vulnerable

Physical Characteristics

Attribute	Black-Based Cluster Fly	Eurasian beaver
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.

Eurasian beaver

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Europe (6 countries). 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.

Eurasian beaver

Eurasian beaver (Castor fiber) is classified as Vulnerable (VU) on the IUCN Red List. Facing a high risk of endangerment in the wild, with declining populations and increasing habitat pressure.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden