Brown Rat vs Puerto Rican crested toad

Rattus norvegicus compared with Peltophryne lemur

Key Differences

• Brown Rat is Least Concern while Puerto Rican crested toad is Endangered.

Taxonomic Classification

Rank	Brown Rat	Puerto Rican crested toad
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Amphibia (Amphibians)
Order	Rodentia (Rodents)	Anura (Frogs & Toads)
Family	Muridae (Mice & Rats)	Bufonidae
Genus	Rattus	Peltophryne
Species	Rattus norvegicus	Peltophryne lemur

Evolutionary Relationship

Brown Rat and Puerto Rican crested toad share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Brown Rat

LC — Least Concern

Puerto Rican crested toad

EN — Endangered

Physical Characteristics

Attribute	Brown Rat	Puerto Rican crested toad
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).

Puerto Rican crested toad

Habitat

Typically found in freshwater habitats, moist forests, and wetlands.

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.