gray wolf vs Thick Shelled River Mussel

Canis lupus compared with Unio crassus

Key Differences

• gray wolf is Critically Endangered while Thick Shelled River Mussel is Endangered.

Taxonomic Classification

Rank	gray wolf	Thick Shelled River Mussel
Kingdom same	Animalia (สัตว์)	Animalia (สัตว์)
Phylum	Chordata (สัตว์มีแกนสันหลัง)	Mollusca (มอลลัสกา)
Class	Mammalia (สัตว์เลี้ยงลูกด้วยน้ำนม)	Bivalvia (ชั้นไบวาลเวีย)
Order	Carnivora (สัตว์กินเนื้อ)	Unionida (Unionida)
Family	Canidae (Dogs & Wolves)	Unionidae
Genus	Canis (Dogs & Wolves)	Unio
Species	Canis lupus	Unio crassus

Evolutionary Relationship

gray wolf and Thick Shelled River Mussel share a common ancestor at the Kingdom level: Animalia. (สัตว์)

Conservation Status

gray wolf

CR — Critically Endangered

Population: ~300.0K

Trend: Stable →

Thick Shelled River Mussel

EN — Endangered

Physical Characteristics

Attribute	gray wolf	Thick Shelled River Mussel
Diet	Carnivore	—
Average Lifespan	13 years	—
Average Length	1.6 m	—
Average Weight	45.0 kg	—

Habitat & Geographic Range

gray wolf

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, deserts and xeric shrublands, and tropical and subtropical dry broadleaf forests, among 13 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Africa (Seychelles), Asia (Japan), Europe (5 countries), North America (7 countries), Oceania and the Pacific (Marshall Islands, Vanuatu), and South America (5 countries). Currently classified as Critically Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

Thick Shelled River Mussel

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and Ukraine. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

gray wolf

The most widely distributed wild canid, gray wolves range from North America across Eurasia in diverse habitats including tundra, forests, and grasslands. Highly social animals living in family packs led by a dominant breeding pair. As keystone predators, wolves regulate prey populations and profoundly shape ecosystem structure, as demonstrated by their reintroduction in Yellowstone. Once heavily persecuted, populations are recovering in many regions.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden