Komodo Dragon vs Simons’s Mouse Opossum

Varanus komodoensis compared with Marmosa simonsi

Key Differences

• Komodo Dragon is Endangered while Simons’s Mouse Opossum is Not Evaluated.

Taxonomic Classification

Rank	Komodo Dragon	Simons’s Mouse Opossum
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Reptilia (Reptiles)	Mammalia (Mammals)
Order	Squamata (Lizards & Snakes)	Didelphimorphia (Didelphimorphia)
Family	Varanidae (Monitor Lizards)	Didelphidae
Genus	Varanus (Monitor Lizards)	Marmosa
Species	Varanus komodoensis	Marmosa simonsi

Evolutionary Relationship

Komodo Dragon and Simons’s Mouse Opossum share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Komodo Dragon

EN — Endangered

Population: ~3.5K

Trend: Stable →

Simons’s Mouse Opossum

NE — Not Evaluated

Physical Characteristics

Attribute	Komodo Dragon	Simons’s Mouse Opossum
Diet	Carnivore	—
Average Lifespan	30 years	—
Average Length	2.6 m	—
Average Weight	70.0 kg	—

Habitat & Geographic Range

Komodo Dragon

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 4 distinct biome types spanning the Australasia and Indomalayan realms. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Indonesia. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Simons’s Mouse Opossum

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Range

Found in Ecuador.

Komodo Dragon

The Komodo dragon is the largest living lizard. It is found only on a few Indonesian islands.