橡树啄木鸟 vs Polar bear

Melanerpes formicivorus compared with Ursus maritimus

Key Differences

• 橡树啄木鸟 is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	橡树啄木鸟	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	Aves (鳥綱)	Mammalia (哺乳動物)
Order	Piciformes (鴷形目)	Carnivora (食肉目)
Family	Picidae	Ursidae (Bears)
Genus	Melanerpes	Ursus (Bears)
Species	Melanerpes formicivorus	Ursus maritimus

Evolutionary Relationship

橡树啄木鸟 and Polar bear share a common ancestor at the Phylum level: Chordata. (脊索动物门)

Conservation Status

橡树啄木鸟

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	橡树啄木鸟	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

橡树啄木鸟

Habitat

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

Range

Distributed across Colombia and Norway.

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.

橡树啄木鸟

橡实啄木鸟（Melanerpes formicivorus）是北美洲西部橡树林中的标志性鸟类，在IUCN红色名录中被评估为无危（LC）。该物种以集体储存橡实的独特行为著称，会将成千上万颗橡实塞入树皮缝隙中作为越冬食物储备。其社会性群居行为和协作繁殖体系在鸟类学研究中颇受关注。

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