Brown Rat vs

Rattus norvegicus compared with Cryptomonas minor

Key Differences

Brown Rat is Least Concern while is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat
Kingdom	Animalia (Animals)	Chromista (Chromista)
Phylum	Chordata (Chordates)	Cryptophyta
Class	Mammalia (Mammals)	Cryptophyceae (Cryptophyceae)
Order	Rodentia (Rodents)	Cryptomonadales (Cryptomonadales)
Family	Muridae (Mice & Rats)	Cryptomonadaceae
Genus	Rattus	Cryptomonas
Species	Rattus norvegicus	Cryptomonas minor

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.

Cryptomonas minor is a small freshwater cryptomonad alga with a compressed, bean-shaped cell body containing phycobilin-bearing plastids, found in lakes, ponds, and slow-moving water bodies. It uses two flagella of unequal length for locomotion and is capable of photosynthesis. Cryptomonas species are important members of freshwater phytoplankton communities and serve as prey for zooplankton.