Brown Rat vs Sargasso Weed

Rattus norvegicus compared with Sargassum natans

Key Differences

• Brown Rat is Least Concern while Sargasso Weed is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat	Sargasso Weed
Kingdom	Animalia (Animals)	Chromista (Chromista)
Phylum	Chordata (Chordates)	Ochrophyta (Ochrophyta)
Class	Mammalia (Mammals)	Phaeophyceae (Phaeophyceae)
Order	Rodentia (Rodents)	Fucales (Fucales)
Family	Muridae (Mice & Rats)	Sargassaceae
Genus	Rattus	Sargassum
Species	Rattus norvegicus	Sargassum natans

Conservation Status

Brown Rat

LC — Least Concern

Sargasso Weed

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Rat	Sargasso Weed
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).

Sargasso Weed

Habitat

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

Range

Distributed across Brazil, Norway, and Sao Tome and Principe.

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.

Shared Countries

Both species can be found in 3 countries:

🇧🇷 Brazil 🇳🇴 Norway 🇸🇹 Sao Tome and Principe