Brown Rat vs Monarch

Rattus norvegicus compared with Danaus plexippus

Key Differences

• Brown Rat is Least Concern while Monarch is Not Evaluated.

Taxonomic Classification

Rank	Brown Rat	Monarch
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Mammalia (Mammals)	Insecta (Insects)
Order	Rodentia (Rodents)	Lepidoptera (Butterflies & Moths)
Family	Muridae (Mice & Rats)	Nymphalidae (Brush-footed Butterflies)
Genus	Rattus	Danaus (Milkweed Butterflies)
Species	Rattus norvegicus	Danaus plexippus

Evolutionary Relationship

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

Conservation Status

Brown Rat

LC — Least Concern

Monarch

NE — Not Evaluated

Trend: Decreasing ↓

Physical Characteristics

Attribute	Brown Rat	Monarch
Diet	—	Herbivore
Average Lifespan	—	1 years
Average Length	—	5 cm
Average Weight	—	0 g

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).

Monarch

Habitat

Typically found in grasslands, forests, and vegetated habitats.

Range

Widely distributed across Asia (Taiwan), Europe (8 countries), North America (Canada, United States), and South America (Colombia).

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.

Monarch

One of the world's most remarkable migratory insects, monarch butterflies undertake multigenerational round-trip migrations of up to 4,800 km between breeding grounds in northern North America and overwintering sites in Mexican mountain forests. Brilliant orange and black wings warn predators of toxicity derived from milkweed plants consumed as caterpillars. Endangered, with overwintering populations having declined by over 80% since the 1990s due to milkweed habitat loss, pesticides, and climate change.

Shared Countries

Both species can be found in 12 countries:

🇧🇪 Belgium 🇨🇦 Canada 🇨🇴 Colombia 🇩🇰 Denmark 🇫🇷 France 🇳🇱 Netherlands 🇵🇹 Portugal 🇪🇸 Spain 🇸🇪 Sweden 🇹🇼 Taiwan 🇬🇧 United Kingdom 🇺🇸 United States