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Flora & Fauna (media)
Blåhale (Favonius quercus)    Blåfugle (Lycaenidae)    [butterfly]    24851
Purple Hairstreak (gb)   Nazarena (es)   Eksnabbvinge (se)      Synonyms: [Quercusia quercus]
Measurements:
Ws: 26-36mm
Generations:
1
Flight period:
JFMAMJJASOND 
se
Identification:
Distribution:
N Africa, Europe, Middle East to Kazakhstan.
Habitat:
Behavior:
Status:
Common and widespread in Denmark in mature oak grows.
Comment:
Purple Hairstreak 909    (3 photos)
2022-07-09    Kongelunden, Danmark

Imago. Han. The large clearing in SV near the western edge.

Suddenly flew in and sat for a few minutes before it took direct flight toward the top of the trees. Despite the strong wind.
Purple Hairstreak 1264    (2 photos)
2022-07-11    Nyttehaver Ugandavej (tårnby), Danmark

Imago. Poor smartphone photos but justified by the observation being rather unusual without oak trees nearby, as far as I know.

The black-and-white double-streak underneath is diagnostic, however, I'm not sure about the sex since the blurred-out upperside is of too poor quality to say for sure. But overall, I would guess it is a female.
Happy Birding
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