Choose a feature that you know. The matching butterflies will be shown by the remaining (male) and (female). Our links will lead you to German-speaking sites.
Baldia's additional distinctive tables: Characteristics of the Lycaenidae: for all principle marks; Baldia's Colorless-Group: for Blues, which have on the underside no orange, silver-spots, brush-wipe, basal-dots and tail, that is "alexis - argiolus - minimus - semiargus - alcon/rebeli - iolas - osiris - daphnis m. - nausithous - teleius - orbitulus"; Baldia's Thersites-Group: for Blues, which have orange and a brush-wipe on the underside, but no basal-dots on the fore-wing, that is "thersites - icarus f. icarinus - agestis - artaxerxes - dorylas - escheri - eumedon"; Baldia's Silver-dot-Group: for "argus - argyrognomon - idas - optilete"; Baldia's Short-tailed-Group :for True Blues, with a tail on the hind-wing margin but without silver-dots, that is "argiades - alcetas - decolorata"; Baldia's Migrant-Blues-Group:for True Blues with a tail and silver-dots, that is "boeticus - pirithous". Baldia's Copper-Group : for Lycaeninae (Coppers); The fore-wing-underside is orange-yellow (except tityrus-male) and there is an unevan margin. Baldia's Hairstreak-Group: for Theclinae (Hairstreaks); There is a white dashed line crossing the hind-wing-underside, which ist sometimes very pale. The tail on the hind-wing margin is noticeable except on rubi.
Information: The linked pages are only available in German language. The colours idenitfy Baldia's groups and additional tables. You can find all principle marks in our table "Characteristics of the Lycaenidae".
This is a pure ASSISTANCE, which should help you to assign your seen Blue to the right family. It can not be a scientifically valid determination key, since this is not possible by studying photos. This butterfly determination help is a free private developement. Unless otherwise stated all shown animals were photographed alive and in their natural freedom and left there undamaged. Photos and classification are from Dolores and Peter Baldia, Vienna, Austria. Idea, texts, translations, website programming and design is from Dolores Baldia. The homepage exists since 13.1. 2018.