Polar bear vs Réunion shelduck

Ursus maritimus compared with Alopochen kervazoi

Key Differences

• Polar bear is Vulnerable while Réunion shelduck is Extinct.

Taxonomic Classification

Rank	Polar bear	Réunion shelduck
Kingdom same	Animalia (hayvan)	Animalia (hayvan)
Phylum same	Chordata (Kordalılar)	Chordata (Kordalılar)
Class	Mammalia (memeliler)	Aves (kuş)
Order	Carnivora (etçiller)	Anseriformes (Kazsılar)
Family	Ursidae (Bears)	Anatidae
Genus	Ursus (Bears)	Alopochen
Species	Ursus maritimus	Alopochen kervazoi

Evolutionary Relationship

Polar bear and Réunion shelduck share a common ancestor at the Phylum level: Chordata. (Kordalılar)

Conservation Status

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Réunion shelduck

EX — Extinct

Physical Characteristics

Attribute	Polar bear	Réunion shelduck
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.

Réunion shelduck

Habitat

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

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.