
Underside of Green-Underside Blue (Glaucopsyche alexis)
Just as the brief description on Wikipedia says, this butterfly lingers in “warm, lush meadows with plenty of its host plant, vetch”. The small habitat of Kaiserstuhl in South-Western Germany fulfils that description perfectly.

The Green-Underside Blue (Glaucopsyche alexis) is a butterfly of the Lycaenidae family. It is found in Europe. The butterfly flies from April to July depending on the location, on warm lush meadows with plenty of hostplant (Vicia).
Similar species: Moths And Butterflies
By pysailor
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Uploaded Jan 29, 2023. Captured May 31, 2014 10:27 in 3MWH+9J Vogtsburg, Germany.