Wolf vs Small Birch Pigmy

Canis lupus compared with Stigmella sakhalinella

Key Differences

• Wolf is Critically Endangered while Small Birch Pigmy is Endangered.

Taxonomic Classification

Rank	Wolf	Small Birch Pigmy
Kingdom same	Animalia (Tier)	Animalia (Tier)
Phylum	Chordata (Chordatiere)	Arthropoda (Gliederfüßer)
Class	Mammalia (Säugetiere)	Insecta (Insekten)
Order	Carnivora (Raubtiere)	Lepidoptera (Schmetterlinge)
Family	Canidae (Dogs & Wolves)	Nepticulidae
Genus	Canis (Dogs & Wolves)	Stigmella
Species	Canis lupus	Stigmella sakhalinella

Evolutionary Relationship

Wolf and Small Birch Pigmy share a common ancestor at the Kingdom level: Animalia. (Tier)

Conservation Status

Wolf

CR — Critically Endangered

Population: ~300.0K

Trend: Stable →

Small Birch Pigmy

EN — Endangered

Physical Characteristics

Attribute	Wolf	Small Birch Pigmy
Diet	Carnivore	—
Average Lifespan	13 years	—
Average Length	1.6 m	—
Average Weight	45.0 kg	—

Habitat & Geographic Range

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.

Small Birch Pigmy

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

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

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