Polar bear vs Red-crowned Crane

Ursus maritimus compared with Grus japonensis

Key Differences

• Polar bear is carnivore while Red-crowned Crane is omnivore.
• Polar bear is 45.0x heavier than Red-crowned Crane.
• Red-crowned Crane lives longer (40 years vs 25 years).

Taxonomic Classification

Rank	Polar bear	Red-crowned Crane
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Carnivora (Carnivorans)	Gruiformes (Gruiformes)
Family	Ursidae (Bears)	Gruidae
Genus	Ursus (Bears)	Grus
Species	Ursus maritimus	Grus japonensis

Evolutionary Relationship

Polar bear and Red-crowned Crane share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Red-crowned Crane

VU — Vulnerable

Population: ~2.8K

Trend: Stable →

Physical Characteristics

Attribute	Polar bear	Red-crowned Crane
Diet	Carnivore	Omnivore
Average Lifespan	25 years	40 years
Average Length	2.4 m	1.5 m
Average Weight	450.0 kg	10.0 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.

Red-crowned Crane

Habitat

Typically found in a wide range of habitat types.

Range

Found across Asia (Taiwan) and Europe (5 countries). Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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.

Red-crowned Crane

One of the rarest cranes in the world, red-crowned cranes stand 1.5 meters tall and are revered in East Asian cultures as symbols of longevity, fidelity, and good fortune. They inhabit wetlands and marshes of Russia, China, Korea, and Japan, performing elaborate and graceful courtship dances involving synchronized leaps, bowing, and calls. Endangered, with the wild population estimated at just 2,750 individuals, threatened by wetland drainage and habitat loss.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway