The two redeyes are easily recognised by their bright red, bulbous eyes and best told apart by size, as well as the shape and amount of blue on the abdomen. This is the commoner Red-eyed Damselfly
(Erythromma najas), which is generally on the wing a month or two earlier than the daintier Small Red-eyed Damselfly. Both species are most often found perching on waterlilies and other floating vegetation.