Blackhead worm vs Eurasian red squirrel

Aporrectodea longa compared with Sciurus vulgaris

Key Differences

• Blackhead worm is Not Evaluated while Eurasian red squirrel is Least Concern.

Taxonomic Classification

Rank	Blackhead worm	Eurasian red squirrel
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Annelida (Segmented Worms)	Chordata (Chordates)
Class	Clitellata (Clitellata)	Mammalia (Mammals)
Order	Crassiclitellata (Crassiclitellata)	Rodentia (Rodents)
Family	Lumbricidae	Sciuridae (Squirrels)
Genus	Aporrectodea	Sciurus (Tree Squirrels)
Species	Aporrectodea longa	Sciurus vulgaris

Evolutionary Relationship

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

Conservation Status

Blackhead worm

NE — Not Evaluated

Eurasian red squirrel

LC — Least Concern

Physical Characteristics

Attribute	Blackhead worm	Eurasian red squirrel
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 red squirrel

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found across Asia (Georgia) and Europe (5 countries).

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 red squirrel

Eurasian red squirrel (Sciurus vulgaris) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 4 countries:

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