Blackhead worm vs Bely Medved

Aporrectodea longa compared with Ursus maritimus

Key Differences

• Blackhead worm is Not Evaluated while Bely Medved is Vulnerable.

Taxonomic Classification

Rank	Blackhead worm	Bely Medved
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum	Annelida (кольчатые черви)	Chordata (хордовые)
Class	Clitellata (поясковые черви)	Mammalia (млекопитающие)
Order	Crassiclitellata (Crassiclitellata)	Carnivora (хищные)
Family	Lumbricidae	Ursidae (Bears)
Genus	Aporrectodea	Ursus (Bears)
Species	Aporrectodea longa	Ursus maritimus

Evolutionary Relationship

Blackhead worm and Bely Medved share a common ancestor at the Kingdom level: Animalia. (животные)

Conservation Status

Blackhead worm

NE — Not Evaluated

Bely Medved

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Blackhead worm	Bely Medved
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

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.

Bely Medved

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. 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.

Bely Medved

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway