Brown Rat vs

Rattus norvegicus compared with Pseudoperonospora urticae

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)	Peronosporaceae
Genus	Rattus	Pseudoperonospora
Species	Rattus norvegicus	Pseudoperonospora urticae

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, inhabiting ecosystems characteristic of the region.

Range

Distributed across 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.

Pseudoperonospora urticae is an obligate biotrophic oomycete downy mildew pathogen in the family Peronosporaceae, infecting stinging nettle (Urtica) species. It causes yellowing and chlorosis of leaves with characteristic grayish sporulation on the undersurface during moist conditions. Its host specificity to nettles makes it an interesting model for studying coevolution between oomycete pathogens and their wild hosts.