Common Blue vs Eros Blue

Polyommatus icarus compared with Polyommatus eros

Key Differences

• Common Blue is Least Concern while Eros Blue is Near Threatened.

Taxonomic Classification

Rank	Common Blue	Eros Blue
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Arthropoda (Arthropods)	Arthropoda (Arthropods)
Class same	Insecta (Insects)	Insecta (Insects)
Order same	Lepidoptera (Butterflies & Moths)	Lepidoptera (Butterflies & Moths)
Family same	Lycaenidae	Lycaenidae
Genus same	Polyommatus	Polyommatus
Species	Polyommatus icarus	Polyommatus eros

Evolutionary Relationship

Common Blue and Eros Blue share a common ancestor at the Genus level: Polyommatus.

Conservation Status

Common Blue

LC — Least Concern

Eros Blue

NT — Near Threatened

Physical Characteristics

Attribute	Common Blue	Eros Blue
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Common Blue

Habitat

Inhabits Mediterranean forests and woodlands within the Palearctic biogeographic realm.

Range

Widely distributed across Asia (Cyprus), Europe (40 countries), and North America (United States).

Eros Blue

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (22 countries). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

Common Blue

Common Blue (Polyommatus icarus) is classified as Least Concern (LC) on the IUCN Red List. Widespread and abundant across its range, with stable populations and no immediate conservation concerns.

Shared Countries

Both species can be found in 22 countries:

🇦🇱 Albania 🇦🇩 Andorra 🇦🇹 Austria 🇧🇾 Belarus 🇧🇦 Bosnia and Herzegovina 🇧🇬 Bulgaria 🇭🇷 Croatia 🇨🇿 Czech Republic 🇫🇷 France 🇩🇪 Germany 🇬🇷 Greece 🇮🇹 Italy 🇱🇮 Liechtenstein 🇲🇪 Montenegro 🇲🇰 North Macedonia 🇵🇱 Poland 🇷🇺 Russia 🇷🇸 Serbia 🇸🇰 Slovakia 🇪🇸 Spain 🇨🇭 Switzerland 🇺🇦 Ukraine