brown-throated three-toed sloth vs Polar bear

Bradypus variegatus compared with Ursus maritimus

Key Differences

• brown-throated three-toed sloth is Least Concern while Polar bear is Vulnerable.
• brown-throated three-toed sloth is herbivore while Polar bear is carnivore.
• Polar bear is 112.5x heavier than brown-throated three-toed sloth.
• brown-throated three-toed sloth lives longer (30 years vs 25 years).

Taxonomic Classification

Rank	brown-throated three-toed sloth	Polar bear
Kingdom same	Animalia (动物界)	Animalia (动物界)
Phylum same	Chordata (脊索动物门)	Chordata (脊索动物门)
Class same	Mammalia (哺乳動物)	Mammalia (哺乳動物)
Order	Pilosa (披毛目)	Carnivora (食肉目)
Family	Bradypodidae (Three-toed Sloths)	Ursidae (Bears)
Genus	Bradypus (Three-toed Sloths)	Ursus (Bears)
Species	Bradypus variegatus	Ursus maritimus

Evolutionary Relationship

brown-throated three-toed sloth and Polar bear share a common ancestor at the Class level: Mammalia. (哺乳動物)

Conservation Status

brown-throated three-toed sloth

LC — Least Concern

Trend: Stable →

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	brown-throated three-toed sloth	Polar bear
Diet	Herbivore	Carnivore
Average Lifespan	30 years	25 years
Average Length	60 cm	2.4 m
Average Weight	4.0 kg	450.0 kg

Habitat & Geographic Range

brown-throated three-toed sloth

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Distributed across Colombia, Ecuador, and Venezuela.

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.

brown-throated three-toed sloth

棕喉三趾树懒是世界上行动最缓慢的哺乳动物之一，倒挂于中南美洲热带雨林的林冠层，平均时速仅0.24公里。其低代谢率是对营养贫乏的叶片食性的关键适应。毛皮中生长的藻类提供伪装，并可能携带具有抗菌特性的共生真菌。蛾、甲虫和真菌在树懒毛皮中形成一个微型生态系统。

Polar bear

北极熊是地球上最大的陆地食肉动物，体重可超过700千克，分布于从加拿大到俄罗斯的北极海冰区。是高度特化的海洋哺乳动物，依赖海冰捕猎环斑海豹和髯海豹。是优秀的游泳者，能够横渡广阔的开阔水域。被列为易危种，因气候变化导致北极海冰迅速减少，种群正受到严重威胁。