Szczudłak zwyczajny, small skipper, Thymelicus sylvestris is a butterfly of the Hesperiidae family.
It has a rusty orange colour to the wings, upper body and the tips of the antennae. The body is silvery white below and it has a wingspan of 25–30 mm. This butterfly’s range includes much of Europe, north Africa and the Middle East. It is typically occurring where grass has grown tall. Eggs are laid loosely inside grass sheaths of the caterpillars food plants from July to August. The newly hatched caterpillars eat their own eggshell before entering hibernation individually in a protective cocoon of a grass sheath sealed with silk.
Source and more info: Wikipedia