The underwing of Romanian butterflies

The pattern on the underwing of some butterflies is very important in determing the species and on this page examples are given of the underwing of selected species seen in Romania.

Fritillaries 

Scarce Fritillary
Twin-spot Fritillary

Blues 

Green-underside Blue
Mazarine Blue
Reverdin's Blue
Chapman's Blue
Silver-studded Blue
Adonis Blue
Iolas Blue