Curruca melanocephala
Look for the 'angry' red eye. They are common in coastal shrubs in Southern Europe. Watch for the long, white-edged tail during flight.
♂ Male · ♀ Female
Male Sardinian Warblers may build several incomplete or “dummy” nests within their territory during the breeding season, likely as part of territorial display and mate attraction. The final nest is then selected and completed mainly by the female.