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Hi Christian!

Thank you for your the help, I haven't taken any of them, when I've take the photo I was living there so it was normal to see them every day, even without knowing what they are.

In the exact point of the photo there was a big area covered by them. I think because it was a place rich of cherry-honeydew, so there was a colony of Lasius sp. , one of Formica fusca and one of Crematogaster scutellaris serching the area.