Polar bear vs Willow Ptarmigan / Red Grouse

Ursus maritimus compared with Lagopus lagopus

Key Differences

• Polar bear is Vulnerable while Willow Ptarmigan / Red Grouse is Near Threatened.

Taxonomic Classification

Rank	Polar bear	Willow Ptarmigan / Red Grouse
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Carnivora (Carnivorans)	Galliformes (Galliformes)
Family	Ursidae (Bears)	Phasianidae
Genus	Ursus (Bears)	Lagopus
Species	Ursus maritimus	Lagopus lagopus

Evolutionary Relationship

Polar bear and Willow Ptarmigan / Red Grouse share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Willow Ptarmigan / Red Grouse

NT — Near Threatened

Physical Characteristics

Attribute	Polar bear	Willow Ptarmigan / Red Grouse
Diet	Carnivore	—
Average Lifespan	25 years	—
Average Length	2.4 m	—
Average Weight	450.0 kg	—

Habitat & Geographic Range

Polar bear

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.

Willow Ptarmigan / Red Grouse

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Distributed across Belgium, France, Norway, Sweden, and United States. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Polar bear

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