Altai Birch Mouse vs Basking shark

Sicista napaea compared with Rhincodon typus

Key Differences

• Altai Birch Mouse is Least Concern while Basking shark is Endangered.

Taxonomic Classification

Rank	Altai Birch Mouse	Basking shark
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Chondrichthyes (Cartilaginous Fish)
Order	Rodentia (Rodents)	Lamniformes (Mackerel Sharks)
Family	Dipodidae	Rhincodontidae (Whale Sharks)
Genus	Sicista	Rhincodon (Whale Sharks)
Species	Sicista napaea	Rhincodon typus

Evolutionary Relationship

Altai Birch Mouse and Basking shark share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Altai Birch Mouse

LC — Least Concern

Basking shark

EN — Endangered

Trend: Decreasing ↓

Physical Characteristics

Attribute	Altai Birch Mouse	Basking shark
Diet	—	Omnivore
Average Lifespan	—	100 years
Average Length	—	12.0 m
Average Weight	—	20.0 t

Habitat & Geographic Range

Altai Birch Mouse

Habitat

Typically found in diverse terrestrial and aquatic ecosystems.

Basking shark

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate grasslands and steppes, and montane grasslands and shrublands, among 5 distinct biome types within the Neotropic biogeographic realm.

Range

Distributed across Chile, Portugal, Taiwan, and Venezuela. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Altai Birch Mouse

The Altai Birch Mouse (Sicista napaea) is a species in the genus Sicista. It is currently classified as Least Concern on the IUCN Red List. Typically found in diverse terrestrial and aquatic ecosystems.

Basking shark

The world's largest fish, whale sharks can exceed 12 meters and 20 tonnes, inhabiting tropical and warm temperate oceans worldwide. Despite their massive size, they are harmless filter feeders, consuming plankton, fish eggs, and small fish by swimming open-mouthed through prey-dense water. They undertake vast seasonal migrations following plankton blooms. Endangered due to fishing, boat strikes, and the live fin trade, with population declining by approximately 50% over the past 75 years.