common bottlenose dolphin vs Common Eider

Tursiops truncatus compared with Somateria mollissima

Key Differences

• common bottlenose dolphin is Least Concern while Common Eider is Near Threatened.

Taxonomic Classification

Rank	common bottlenose dolphin	Common Eider
Kingdom same	Animalia (động vật)	Animalia (động vật)
Phylum same	Chordata (động vật có dây sống)	Chordata (động vật có dây sống)
Class	Mammalia (lớp Thú)	Aves (chim)
Order	Cetacea (Whales & Dolphins)	Anseriformes (bộ Ngỗng)
Family	Delphinidae (Oceanic Dolphins)	Anatidae
Genus	Tursiops (Bottlenose Dolphins)	Somateria
Species	Tursiops truncatus	Somateria mollissima

Evolutionary Relationship

common bottlenose dolphin and Common Eider share a common ancestor at the Phylum level: Chordata. (động vật có dây sống)

Conservation Status

common bottlenose dolphin

LC — Least Concern

Population: ~600.0K

Trend: Stable →

Common Eider

NT — Near Threatened

Physical Characteristics

Attribute	common bottlenose dolphin	Common Eider
Diet	Carnivore	—
Average Lifespan	45 years	—
Average Length	3.0 m	—
Average Weight	300.0 kg	—

Habitat & Geographic Range

common bottlenose dolphin

Habitat

Found across multiple habitat types including tropical and subtropical moist broadleaf forests, tropical and subtropical dry broadleaf forests, and tropical and subtropical grasslands and savannas, among 12 distinct biome types. Populations are also found in montane and highland environments at higher elevations.

Range

Widely distributed across Asia (Taiwan), Europe (6 countries), and South America (Colombia, Ecuador, Venezuela).

Common Eider

Habitat

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

Range

Found across Europe (5 countries) and North America (United States). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

common bottlenose dolphin

The most studied and recognized dolphin species, bottlenose dolphins inhabit warm and temperate oceans worldwide, from coastal shallows to the open sea. Highly intelligent with large brains relative to body size, they demonstrate self-recognition, complex communication, and social learning. They live in fluid fission-fusion societies and cooperate to herd fish. A keystone indicator species for marine ecosystem health.

Common Eider

Common Eider (Somateria mollissima) is classified as Near Threatened (NT) on the IUCN Red List. Close to qualifying as threatened, with populations that may become vulnerable without conservation action.

Shared Countries

Both species can be found in 5 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden 🇺🇦 Ukraine