Common Seal vs Ferruginous Duck

Phoca vitulina compared with Aythya nyroca

Key Differences

Common Seal is Near Threatened while Ferruginous Duck is Not Evaluated.

Taxonomic Classification

Rank	Common Seal	Ferruginous Duck
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class	Mammalia (Mammals)	Aves (Birds)
Order	Pinnipedia (Seals & Sea Lions)	Anseriformes (Anseriformes)
Family	Phocidae (True Seals)	Anatidae
Genus	Phoca (Harbor Seals)	Aythya
Species	Phoca vitulina	Aythya nyroca

Evolutionary Relationship

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

View Phylum: Chordata

Conservation Status

Common Seal

NT — Near Threatened

Population: ~500.0K

Trend: Stable →

Ferruginous Duck

NE — Not Evaluated

Physical Characteristics

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

Habitat & Geographic Range

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.

Ferruginous Duck

Habitat

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

Range

Found across Asia (Taiwan) and Europe (8 countries).

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.

Ferruginous Duck

Ferruginous Duck (Aythya nyroca) is classified as Not Evaluated (NE) on the IUCN Red List. Not yet evaluated against IUCN Red List criteria. Conservation status remains to be determined.