American Brook Lamprey vs Bely Medved

Lethenteron appendix compared with Ursus maritimus

Key Differences

• American Brook Lamprey is Least Concern while Bely Medved is Vulnerable.

Taxonomic Classification

Rank	American Brook Lamprey	Bely Medved
Kingdom same	Animalia (животные)	Animalia (животные)
Phylum same	Chordata (хордовые)	Chordata (хордовые)
Class	Petromyzonti (Petromyzonti)	Mammalia (млекопитающие)
Order	Petromyzontiformes (миногообразные)	Carnivora (хищные)
Family	Petromyzontidae	Ursidae (Bears)
Genus	Lethenteron	Ursus (Bears)
Species	Lethenteron appendix	Ursus maritimus

Evolutionary Relationship

American Brook Lamprey and Bely Medved share a common ancestor at the Phylum level: Chordata. (хордовые)

Conservation Status

American Brook Lamprey

LC — Least Concern

Bely Medved

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	American Brook Lamprey	Bely Medved
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

American Brook Lamprey

Habitat

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

Range

Found in 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.

American Brook Lamprey

The American Brook Lamprey (Lethenteron appendix) is a species in the genus Lethenteron. It is currently classified as Least Concern on the IUCN Red List. Native to North America, inhabiting ecosystems characteristic of the region.

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.