Bitternut vs Brown Rat

Carya cordiformis compared with Rattus norvegicus

Taxonomic Classification

Rank	Bitternut	Brown Rat
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Magnoliophyta (Flowering Plants)	Chordata (Chordates)
Class	Magnoliopsida (Dicots)	Mammalia (Mammals)
Order	Fagales (Beeches & Oaks)	Rodentia (Rodents)
Family	Juglandaceae	Muridae (Mice & Rats)
Genus	Carya	Rattus
Species	Carya cordiformis	Rattus norvegicus

Conservation Status

Bitternut

LC — Least Concern

Brown Rat

LC — Least Concern

Physical Characteristics

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

Habitat & Geographic Range

Bitternut

Habitat

Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

Range

Found across Europe (5 countries) and North America (Canada, United States).

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).

Bitternut

The Bitternut (Carya cordiformis) is a species in the genus Carya. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial habitats from tropical forests to temperate regions.

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 7 countries:

🇧🇪 Belgium 🇨🇦 Canada 🇫🇷 France 🇳🇱 Netherlands 🇵🇱 Poland 🇬🇧 United Kingdom 🇺🇸 United States