Brown Skua vs Common Seal

Stercorarius antarcticus compared with Phoca vitulina

Key Differences

• Brown Skua is Not Evaluated while Common Seal is Near Threatened.

Taxonomic Classification

Rank	Brown Skua	Common Seal
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Aves (Birds)	Mammalia (Mammals)
Order	Charadriiformes (Charadriiformes)	Pinnipedia (Seals & Sea Lions)
Family	Stercorariidae	Phocidae (True Seals)
Genus	Stercorarius	Phoca (Harbor Seals)
Species	Stercorarius antarcticus	Phoca vitulina

Evolutionary Relationship

Brown Skua and Common Seal share a common ancestor at the Phylum level: Chordata. (Chordates)

Conservation Status

Brown Skua

NE — Not Evaluated

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Physical Characteristics

Attribute	Brown Skua	Common Seal
Diet	—	Carnivore
Average Lifespan	—	30 years
Average Length	—	1.7 m
Average Weight	—	80.0 kg

Habitat & Geographic Range

Brown Skua

Habitat

Typically found in various aerial, terrestrial, and aquatic environments.

Range

Found in Norway.

Common Seal

Habitat

Typically found in diverse ecosystems where prey species are available.

Range

Found across Europe (7 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Brown Skua

The Brown Skua (Stercorarius antarcticus) is a species in the genus Stercorarius. Typically found in various aerial, terrestrial, and aquatic environments. Found in Norway. As a member of the genus Stercorarius, it shares characteristics with related species within this taxonomic group.

Common Seal

The most widely distributed pinniped, harbor seals inhabit temperate and subarctic coastal waters of both the North Atlantic and North Pacific. Adults reach up to 130 kg and spend roughly equal time at sea hunting fish, squid, and crustaceans and hauling out on beaches or rocks to rest. Their large, expressive eyes are adapted for underwater vision in low light. Harbor seals are a critical food source for orcas, sharks, and polar bears.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway