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Butterflies of temperate Asia
Eros Blue
Polyommatus eros  OCHSENHEIMER, 1808
Family - LYCAENIDAE
subfamily - POLYOMMATINAE
Tribe - POLYOMMATINI
Polyommatus eros, Sichuan, China   Tony Hoare
Introduction

The taxonomy of the genus Polyommatus has recently been revised so that it now includes those species formerly placed in Lysandra, Neolysandra, Sublysandra, Plebicula, Elviria, Rimisia, Bryna, Meleageria, Agrodiaetus, Paragrodiaetus and Cyaniris. Defined thus Polyommatus comprises about 220 species, distributed variously across Europe, North Africa, temperate Asia and North America.

Polyommatus eros is distributed from Spain to Siberia and China.
Habitats
This species inhabits flowery slopes with short turf, at elevations between about 1000-3000m.
Lifecycle

The larval foodplants are various Oxytropis species ( Fabaceae ). The larvae are attended by ants of the genera Formica and Myrmica.

Adult behaviour

Males commonly aggregate with other Polyommatinae to imbibe mineralised moisture fro the edges of puddles and small streams. Both sexes visit a wide range of flowers for nectar. The butterflies roost overnight on grass heads.

 

 

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