Emperor Penguin vs Scaly-sided Merganser

Aptenodytes forsteri compared with Mergus squamatus

Key Differences

Emperor Penguin is Near Threatened while Scaly-sided Merganser is Endangered.

Taxonomic Classification

Rank	Emperor Penguin	Scaly-sided Merganser
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Chordata (Chordates)	Chordata (Chordates)
Class same	Aves (Birds)	Aves (Birds)
Order	Sphenisciformes (Penguins)	Anseriformes (Anseriformes)
Family	Spheniscidae (Penguins)	Anatidae
Genus	Aptenodytes (Great Penguins)	Mergus
Species	Aptenodytes forsteri	Mergus squamatus

Evolutionary Relationship

Emperor Penguin and Scaly-sided Merganser share a common ancestor at the Class level: Aves. (Birds)

View Class: Aves

Conservation Status

Emperor Penguin

NT — Near Threatened

Population: ~595.0K

Trend: Stable →

Scaly-sided Merganser

EN — Endangered

Physical Characteristics

Attribute	Emperor Penguin	Scaly-sided Merganser
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.

Scaly-sided Merganser

Habitat

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

Range

Distributed across Norway and Taiwan. Currently classified as Endangered on the IUCN Red List, this species faces significant conservation challenges across its range.

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.