common blow flie vs Polar bear

Calliphora vicina compared with Ursus maritimus

Key Differences

common blow flie is Least Concern while Polar bear is Vulnerable.

Taxonomic Classification

Rank	common blow flie	Polar bear
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum	Arthropoda (節足動物)	Chordata (脊索動物)
Class	Insecta (昆虫)	Mammalia (哺乳類)
Order	Diptera (ハエ目)	Carnivora (ネコ目)
Family	Calliphoridae	Ursidae (Bears)
Genus	Calliphora	Ursus (Bears)
Species	Calliphora vicina	Ursus maritimus

Evolutionary Relationship

common blow flie and Polar bear share a common ancestor at the Kingdom level: Animalia. (動物)

表示 Kingdom: Animalia

Conservation Status

common blow flie

LC — Least Concern

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	common blow flie	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

common blow flie

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Widely distributed across Africa (South Africa), Europe (5 countries), and North America (United States).

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 blow flie

The common blow fly (<em>Calliphora vicina</em>) is a large, metallic-blue fly belonging to the family Calliphoridae. It is classified as Least Concern on the IUCN Red List and has been recorded across terrestrial and freshwater habitats in Africa, including South Africa, as well as across five European countries and the United States. <em>Calliphora vicina</em> is one of the most familiar blow fly species in temperate regions, often found around human settlements, carrion, and organic waste. It plays an important ecological role as an early colonizer of decomposing animal matter, and its predictable developmental stages make it a key species in forensic entomology for estimating post-mortem intervals. Adults typically feed on nectar, pollen, and decaying matter, while larvae develop in carrion or, occasionally, in wounds. The species is cold-tolerant and often active during cool weather when other blow flies are less abundant. Biological traits of this species remain poorly documented in the scientific literature.

Polar bear

地球上で最大の陸上肉食動物であるホッキョクグマは700kgを超えることがあり、カナダからロシアまでの北極海氷域全体に分布する。ワモンアザラシとヒゲアザラシを狩るために海氷に依存する高度に特化した海洋哺乳類である。広大な距離を泳ぐことができる優れた泳者でもある。脆弱種に指定されており、気候変動による急激な北極海氷の消失で個体群が深刻な圧力を受けている。