Common Oak vs Polar bear

Quercus robur compared with Ursus maritimus

Key Differences

• Common Oak is Least Concern while Polar bear is Vulnerable.
• Common Oak is autotroph while Polar bear is carnivore.
• Common Oak lives longer (1000 years vs 25 years).

Taxonomic Classification

Rank	Common Oak	Polar bear
Kingdom	Plantae (植物)	Animalia (动物界)
Phylum	Magnoliophyta (木兰植物门)	Chordata (脊索动物门)
Class	Magnoliopsida (木兰纲)	Mammalia (哺乳動物)
Order	Fagales (壳斗目)	Carnivora (食肉目)
Family	Fagaceae (Beech Family)	Ursidae (Bears)
Genus	Quercus (Oaks)	Ursus (Bears)
Species	Quercus robur	Ursus maritimus

Conservation Status

Common Oak

LC — Least Concern

Trend: Stable →

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Common Oak	Polar bear
Diet	Autotroph	Carnivore
Average Lifespan	1000 years	25 years
Average Length	25.0 m	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Common Oak

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Widely distributed across Africa (Lesotho, South Africa), Asia (Armenia, India), Europe (8 countries), North America (Canada, United States), Oceania and the Pacific (Australia, New Zealand), and South America (4 countries).

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.

Common Oak

英国栎（Quercus robur）是欧洲最重要、分布最广的落叶乔木之一，寿命可逾千年，高达40米，所支撑的生物多样性超过欧洲任何其他树种，超过2300种昆虫、真菌、地衣、苔藓和鸟类直接依赖成熟栎树为生。分布于欧洲全境至西亚的温带森林，其坚硬耐久的木材在历史上是造船、建筑和制桶的基础材料。

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。

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway