Hausmaus vs Eisbär

Mus musculus compared with Ursus maritimus

Key Differences

• Hausmaus is Least Concern while Eisbär is Vulnerable.
• Hausmaus is omnivore while Eisbär is carnivore.
• Eisbär is 22500.0x heavier than Hausmaus.
• Eisbär lives longer (25 years vs 2 years).

Taxonomic Classification

Rank	Hausmaus	Eisbär
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum same	Chordata (Chordatiere)	Chordata (Chordatiere)
Class same	Mammalia (Säugetiere)	Mammalia (Säugetiere)
Order	Rodentia (Nagetiere)	Carnivora (Raubtiere)
Family	Muridae (Mice & Rats)	Ursidae (Bears)
Genus	Mus (House Mice)	Ursus (Bears)
Species	Mus musculus	Ursus maritimus

Evolutionary Relationship

Hausmaus and Eisbär share a common ancestor at the Class level: Mammalia. (Säugetiere)

Conservation Status

Hausmaus

LC — Least Concern

Trend: Stable →

Eisbär

VU — Vulnerable

Population: ~26.0K

Trend: Decreasing ↓

Physical Characteristics

Attribute	Hausmaus	Eisbär
Diet	Omnivore	Carnivore
Average Lifespan	2 years	25 years
Average Length	9 cm	2.4 m
Average Weight	20 g	450.0 kg

Habitat & Geographic Range

Hausmaus

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and flooded grasslands and savannas, among 8 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (9 countries), Asia (13 countries), Europe (41 countries), North America (14 countries), Oceania and the Pacific (12 countries), and South America (10 countries).

Eisbär

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.

Hausmaus

Among the most widespread and numerous mammals on Earth, house mice originated in South Asia and have accompanied human civilization across every continent except Antarctica. Weighing just 15–25 g, they are highly adaptable omnivores capable of surviving on minimal food and water. As the world's most commonly used laboratory animal, the house mouse has contributed to virtually every branch of biomedical research. They cause significant agricultural damage globally.

Eisbär

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.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway