Brown Rat vs

Rattus norvegicus compared with Pythium torulosum

Key Differences

• Brown Rat is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat
Kingdom	Animalia (Animals)	Chromista (Chromista)
Phylum	Chordata (Chordates)	Oomycota (Oomycetes)
Class	Mammalia (Mammals)	Peronosporea (Peronosporea)
Order	Rodentia (Rodents)	Peronosporales (Peronosporales)
Family	Muridae (Mice & Rats)	Pythiaceae
Genus	Rattus	Pythium
Species	Rattus norvegicus	Pythium torulosum

Conservation Status

Brown Rat

LC — Least Concern

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Brown Rat

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 10 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (11 countries), Asia (15 countries), Europe (41 countries), North America (16 countries), Oceania and the Pacific (10 countries), and South America (10 countries).

Habitat

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

Range

Distributed across Brazil, Norway, and Sweden.

Brown Rat

Brown Rat (Rattus norvegicus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Pythium torulosum is an aquatic oomycete in the family Pythiaceae, known as a plant pathogen causing damping-off and root rot diseases in seedlings and crops. It produces zoospores for dispersal and thrives in wet soil and flooded growing conditions.

Shared Countries

Both species can be found in 3 countries:

🇧🇷 Brazil 🇳🇴 Norway 🇸🇪 Sweden