Stilbus testaceus is a species of beetle commonly called shining flower beetle belonging to the family Phalacridae.
This rather common species is present in most of Europe and in the Afrotropical realm.
These beetles can be found in meadows and forest edges, on flowers, on dry grass and hay, in moss and dead leaves.
Stilbus testaceus can reach a length of . These tiny beetles have a spherical-oval brownish body, with a yellowish- reddish apex of the elitra. Head and pronotum are dark. The hind angles of the pronotum are sharp, right-angled.
Adults can be found from May to October on flowering grasses, while in Winter they rest under fallen leaves and among the mosses.