Blackhead worm vs Emperor Penguin

Aporrectodea longa compared with Aptenodytes forsteri

Key Differences

• Blackhead worm is Not Evaluated while Emperor Penguin is Near Threatened.

Taxonomic Classification

Rank	Blackhead worm	Emperor Penguin
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Annelida (Segmented Worms)	Chordata (Chordates)
Class	Clitellata (Clitellata)	Aves (Birds)
Order	Crassiclitellata (Crassiclitellata)	Sphenisciformes (Penguins)
Family	Lumbricidae	Spheniscidae (Penguins)
Genus	Aporrectodea	Aptenodytes (Great Penguins)
Species	Aporrectodea longa	Aptenodytes forsteri

Evolutionary Relationship

Blackhead worm and Emperor Penguin share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

Blackhead worm

NE — Not Evaluated

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Physical Characteristics

Attribute	Blackhead worm	Emperor Penguin
Diet	—	Carnivore
Average Lifespan	—	20 years
Average Length	—	1.1 m
Average Weight	—	40.0 kg

Habitat & Geographic Range

Blackhead worm

Habitat

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

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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.

Blackhead worm

The Blackhead worm (Aporrectodea longa) is a species in the genus Aporrectodea. Native to Europe and North America, inhabiting ecosystems characteristic of the region. Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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