vs Polar bear

Navicula hambergi compared with Ursus maritimus

Key Differences

is Not Evaluated while Polar bear is Vulnerable.

Taxonomic Classification

Rank		Polar bear
Kingdom	Chromista (أسناخ صبغية)	Animalia (حيوانات)
Phylum	Ochrophyta (طحالب داكنة)	Chordata (حبليات)
Class	Bacillariophyceae (Bacillariophyceae)	Mammalia (ثدييات)
Order	Naviculales (Naviculales)	Carnivora (لواحم)
Family	Naviculaceae	Ursidae (Bears)
Genus	Navicula	Ursus (Bears)
Species	Navicula hambergi	Ursus maritimus

Conservation Status

NE — Not Evaluated

Polar bear

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

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

Habitat & Geographic Range

Habitat

Native to Asia and Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Sweden and Taiwan.

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.

Navicula hambergi is a boat-shaped pennate diatom found in freshwater benthic and planktonic habitats. Its symmetrical, lanceolate silica frustule with a central raphe is typical of the large Navicula genus. This species contributes to aquatic primary production and is used in biological monitoring of freshwater quality, as different Navicula species have varying tolerances to pollution.

Polar bear

The largest land carnivore on Earth, polar bears can exceed 700 kg and are found across Arctic sea ice from Canada to Russia. Highly specialized marine mammals that rely on sea ice to hunt ringed and bearded seals. Excellent swimmers capable of covering vast distances in open water. Listed as Vulnerable, with populations under severe pressure from rapid Arctic sea ice loss due to climate change.