Common Marsupial Frog vs Polar bear

Gastrotheca ovifera compared with Ursus maritimus

Taxonomic Classification

Rank	Common Marsupial Frog	Polar bear
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class	Amphibia (両生類)	Mammalia (哺乳類)
Order	Anura (カエル)	Carnivora (ネコ目)
Family	Hemiphractidae	Ursidae (Bears)
Genus	Gastrotheca	Ursus (Bears)
Species	Gastrotheca ovifera	Ursus maritimus

Evolutionary Relationship

Common Marsupial Frog and Polar bear share a common ancestor at the Phylum level: Chordata. (脊索動物)

Conservation Status

Common Marsupial Frog

VU — Vulnerable

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Common Marsupial Frog	Polar bear
Diet	—	Carnivore
Average Lifespan	—	25 years
Average Length	—	2.4 m
Average Weight	—	450.0 kg

Habitat & Geographic Range

Common Marsupial Frog

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

Range

Found in Venezuela. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

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 Marsupial Frog

<em>Gastrotheca ovifera</em>, the common marsupial frog, is a tree frog in the family Hemiphractidae, endemic to Venezuela. It is classified as Vulnerable on the IUCN Red List, reflecting population declines associated with habitat loss and degradation. This species is typically found in freshwater environments, moist montane forests, and wetland habitats within Venezuela's highlands. The common marsupial frog takes its name from the female's dorsal brood pouch, in which fertilized eggs are carried and develop until the young emerge as advanced tadpoles or juvenile froglets. This reproductive adaptation reduces dependence on standing water for larval development and provides protection for the developing young. Like other members of the family Hemiphractidae, this species is associated with humid forest environments where moisture is reliably available. Deforestation and agricultural expansion in Venezuela's montane forest habitats represent significant threats to this and related species. Detailed data on population estimates, lifespan, and body measurements for this species remain limited in current 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。