Emperor Penguin vs Striped Acorn Barnacle

Aptenodytes forsteri compared with Amphibalanus amphitrite

Key Differences

• Emperor Penguin is Near Threatened while Striped Acorn Barnacle is Not Evaluated.

Taxonomic Classification

Rank	Emperor Penguin	Striped Acorn Barnacle
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Chordata (Chordates)	Arthropoda (Arthropods)
Class	Aves (Birds)	Maxillopoda (Maxillopoda)
Order	Sphenisciformes (Penguins)	Sessilia (Sessilia)
Family	Spheniscidae (Penguins)	Balanidae
Genus	Aptenodytes (Great Penguins)	Amphibalanus
Species	Aptenodytes forsteri	Amphibalanus amphitrite

Evolutionary Relationship

Emperor Penguin and Striped Acorn Barnacle share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Striped Acorn Barnacle

NE — Not Evaluated

Physical Characteristics

Attribute	Emperor Penguin	Striped Acorn Barnacle
Diet	Carnivore	—
Average Lifespan	20 years	—
Average Length	1.1 m	—
Average Weight	40.0 kg	—

Habitat & Geographic Range

Emperor Penguin

Habitat

Found across multiple habitat types including temperate broadleaf and mixed forests, temperate coniferous forests, and boreal forests and taiga, among 4 distinct biome types within the Palearctic biogeographic realm. Populations are also found in montane and highland environments at higher elevations.

Range

Found in Norway. Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Striped Acorn Barnacle

Habitat

Native to Asia and Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Widely distributed across Asia (4 countries), Europe (15 countries), North America (6 countries), Oceania and the Pacific (5 countries), and South America (4 countries).

Emperor Penguin

The world's largest penguin, emperor penguins stand up to 1.2 meters and weigh 45 kg, inhabiting the Antarctic continent in some of the most extreme conditions on Earth. They breed in midwinter darkness at temperatures below -60°C, with males incubating single eggs on their feet under a brood pouch for 65 days while females are at sea. Their huddling behavior — cycling individuals through the warm center of thousands-strong groups — is a masterclass in cooperative survival.

Shared Countries

Both species can be found in 1 countries:

🇳🇴 Norway