The slender, all-blue males skim swiftly over the water and rest on floating perches, far from the banks. Has broad antehumeral stripes and a terminal-shifted ‘blue tail’.
Total: 30-36 mm.
Abdomen: 24-28 mm.
Hindwing: 19-21 mm.
Larger, well-oxygenated waters, including lakes, gravel pits, slow-flowing rivers and wide canals, with rich aquatic vegetation.
From March to October in the north, bu mainly in July and August in the north.
Not yet registered in Denmark.