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Hi Milosza,
the rule is one specimen per thread (see FAQ : https://diptera.info/faq.php?cat_id=2).
1. is a female Thricops simplex (Muscidae).
2-3 is indeed Medetera species, I can't tell if it is jacula.
4-6 Chloropidae
7. Female Lucilia sericata-group.