On Aug 3, 2008, philomel from Castelnau RB Pyrenées,
France (Zone 8a) wrote:
A predatory bug, specialising in eating other insects that get into trouble in the water. They have water repellent hairs on the underside to help them walk on the water surface.
The wings show different levels of development between individuals, those with well developed wings often flying far from water to hibernate.