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Glyphipterix forsterella
The wingspan is 11–15 mm. According to Wikipedia adults are on wing from May to June and feed on the flowers of the larval host plant, but actually from my experience I can say that the closer was getting to May the less I could see them, they were many more in April and in May a smaller number. There is one generation per year. The larvae feed on the seeds of Carex species, including Carex vulpina and Carex remota. The species overwinters in the larval stage within the spikes of the host plant
Very common! According to Wikipedia it is found from most of Europe (except most of the Balkan Peninsula, Portugal and Ukraine),east to Japan but if Istria is considered as part of Balkan too, than the information is not correct since this is one of the most common species you would encounter on every meadow..
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