Chestnut-backed Thornbird vs Polar bear

Phacellodomus dorsalis compared with Ursus maritimus

Key Differences

• Chestnut-backed Thornbird is Near Threatened while Polar bear is Vulnerable.

Taxonomic Classification

Rank	Chestnut-backed Thornbird	Polar bear
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Passeriformes (Songbirds)	Carnivora (Carnivorans)
Family	Furnariidae	Ursidae (Bears)
Genus	Phacellodomus	Ursus (Bears)
Species	Phacellodomus dorsalis	Ursus maritimus

Evolutionary Relationship

Chestnut-backed Thornbird and Polar bear share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Chestnut-backed Thornbird

NT — Near Threatened

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Chestnut-backed Thornbird	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Chestnut-backed Thornbird

Habitat

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

Range

Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

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.

Chestnut-backed Thornbird

The Chestnut-backed Thornbird (Phacellodomus dorsalis) is a species in the genus Phacellodomus. It is currently classified as Near Threatened on the IUCN Red List. 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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway