Brown Rat vs Onion Neck Rot

Rattus norvegicus compared with Botrytis aclada

Key Differences

• Brown Rat is Least Concern while Onion Neck Rot is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat	Onion Neck Rot
Kingdom	Animalia (Animals)	Fungi (Fungi)
Phylum	Chordata (Chordates)	Ascomycota (Sac Fungi)
Class	Mammalia (Mammals)	Leotiomycetes (Leotiomycetes)
Order	Rodentia (Rodents)	Helotiales (Helotiales)
Family	Muridae (Mice & Rats)	Sclerotiniaceae
Genus	Rattus	Botrytis
Species	Rattus norvegicus	Botrytis aclada

Conservation Status

Brown Rat

LC — Least Concern

Onion Neck Rot

NE — Not Evaluated

Physical Characteristics

Attribute	Brown Rat	Onion Neck Rot
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).

Onion Neck Rot

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark 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.

Shared Countries

Both species can be found in 2 countries:

🇩🇰 Denmark 🇸🇪 Sweden