Brown Grey Scoparia ambigualis

Below to the left the Brown Grey. The adults of this species fly from May to July and the larvae supposingly feed on mosses. Wingspan: up to 22 mm in this and most of the similar species. Be very careful when recording them. There are some 14 species of Scopariinae and some are very hard to tell apart! The Brown Grey is extremely similar to Eudonia truncicolella and Scoparia ambigualis. Characteristics for the three species are as follows:

The black spot resembling an x, usually looks like an x in the Brown Grey and Eudonia truncicolella. However in Dipleurina lacustrata it does look more like a c. The wings of Scoparia ambigualis are broader than those of the other two species. The dark line just in front of of the white is best developed in Dipleurina lacustrata, less so in the Brown Grey and least in Eudonia truncicolella. Eudonia truncicolella is rather black and white lacking brownish tones so visible in the Brown Grey. Eudonia truncicolella and Dipleurina lacustrata don't fly in May and the first half of June, the Brown Grey however does.
Do keep in mind though that you can never be sure, for especially Scoparia ambigualis is very variable. The only way to tell them apart for sure is by examining the genitals. And when you are a beginner do take good pictures and present them to experienced microlepidopterists, or on a good forum on the internet.