Blackhead worm vs Eurasian beaver

Aporrectodea longa compared with Castor fiber

Key Differences

• Blackhead worm is Not Evaluated while Eurasian beaver is Vulnerable.

Taxonomic Classification

Rank	Blackhead worm	Eurasian beaver
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Annelida (Segmented Worms)	Chordata (Chordates)
Class	Clitellata (Clitellata)	Mammalia (Mammals)
Order	Crassiclitellata (Crassiclitellata)	Rodentia (Rodents)
Family	Lumbricidae	Castoridae (Beavers)
Genus	Aporrectodea	Castor (Beavers)
Species	Aporrectodea longa	Castor fiber

Evolutionary Relationship

Blackhead worm and Eurasian beaver share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Blackhead worm

NE — Not Evaluated

Eurasian beaver

VU — Vulnerable

Physical Characteristics

Attribute	Blackhead worm	Eurasian beaver
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blackhead worm

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, 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.

Blackhead worm

The Blackhead worm (Aporrectodea longa) is a species in the genus Aporrectodea. Native to Europe and North America, inhabiting ecosystems characteristic of the region. Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden