Amazon River Dolphin vs Brown Rat

Inia geoffrensis compared with Rattus norvegicus

Key Differences

• Amazon River Dolphin is Data Deficient while Brown Rat is Least Concern.

Taxonomic Classification

Rank	Amazon River Dolphin	Brown Rat
Kingdom same	Animalia (動物)	Animalia (動物)
Phylum same	Chordata (脊索動物)	Chordata (脊索動物)
Class same	Mammalia (哺乳類)	Mammalia (哺乳類)
Order	Cetacea (Whales & Dolphins)	Rodentia (ネズミ目)
Family	Iniidae	Muridae (Mice & Rats)
Genus	Inia	Rattus
Species	Inia geoffrensis	Rattus norvegicus

Evolutionary Relationship

Amazon River Dolphin and Brown Rat share a common ancestor at the Class level: Mammalia. (哺乳類)

Conservation Status

Amazon River Dolphin

DD — Data Deficient

Brown Rat

LC — Least Concern

Physical Characteristics

Attribute	Amazon River Dolphin	Brown Rat
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Amazon River Dolphin

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Distributed across Colombia, Ecuador, and Venezuela.

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).

Amazon River Dolphin

The Amazon River Dolphin (Inia geoffrensis) is a species in the genus Inia. Its conservation status is listed as Data Deficient, indicating insufficient data for assessment. Typically found in diverse terrestrial and aquatic ecosystems.

Brown Rat

ドブネズミ（Rattus norvegicus）はIUCNレッドリストで軽度懸念（LC）に分類されています。分布域全体に広く生息し個体数は安定しており、緊急の保護上の懸念はありません。

Shared Countries

Both species can be found in 3 countries:

🇨🇴 Colombia 🇪🇨 Ecuador 🇻🇪 Venezuela