gray wolf vs Least Brook Lamprey

Canis lupus compared with Lampetra aepyptera

Key Differences

• gray wolf is Critically Endangered while Least Brook Lamprey is Least Concern.

Taxonomic Classification

Rank	gray wolf	Least Brook Lamprey
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Petromyzonti (Petromyzonti)
Order	Carnivora (Carnivorans)	Petromyzontiformes (lamprey)
Family	Canidae (Dogs & Wolves)	Petromyzontidae
Genus	Canis (Dogs & Wolves)	Lampetra
Species	Canis lupus	Lampetra aepyptera

Evolutionary Relationship

gray wolf and Least Brook Lamprey share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

gray wolf

CR — Critically Endangered

Population: ~300.0K

Trend: Stable →

Least Brook Lamprey

LC — Least Concern

Physical Characteristics

Attribute	gray wolf	Least Brook Lamprey
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.

Least Brook Lamprey

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.