Brown Rat vs Chalky Macoma

Rattus norvegicus compared with Macoma calcarea

Taxonomic Classification

Rank	Brown Rat	Chalky Macoma
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Mollusca (Mollusks)
Class	Mammalia (Mammals)	Bivalvia (Bivalvia)
Order	Rodentia (Rodents)	Cardiida (Cardiida)
Family	Muridae (Mice & Rats)	Tellinidae
Genus	Rattus	Macoma
Species	Rattus norvegicus	Macoma calcarea

Evolutionary Relationship

Brown Rat and Chalky Macoma share a common ancestor at the Kingdom level: Animalia. (Animals)

View Kingdom: Animalia

Conservation Status

Brown Rat

LC — Least Concern

Chalky Macoma

LC — Least Concern

Physical Characteristics

Attribute	Brown Rat	Chalky Macoma
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).

Chalky Macoma

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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.

Chalky Macoma

The Chalky Macoma (Macoma calcarea) is a species in the genus Macoma. It is currently classified as Least Concern on the IUCN Red List. Native to Europe and North America, inhabiting ecosystems characteristic of the region.