Cupido osiris (NL: Zuidelijk dwergblauwtje / EN: Osiris Blue / DE: Kleiner Alpen-Bläuling / FR: Azuré de la chevrette, Azuré osiris) is a butterfly in the family Lycaenidae. The species is very similar to Cupido minimus (see this image) based on the underside alone. It is probably much easier to differentiate them in the field where the blue upperside of the male osiris is clearly apparent, and the females can be identified by the visible uppersides in flight as well. The theory about the series of four unh post-discal spots being in a straight line in osiris seems only to hold true for the female. The males can vary significantly.
Image: Soglio (CH) – 12/07/2012
© Johan Dierckx
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