Cyril Ruoso / Flock of Barn swallows (Hirundo rustica) perched on power lines during migration, France. September.

Bernard Castelein / Migrant spreadwing (Lestes barbarus) male at rest, dew droplets on wings. Klein Schietveld, Brasschaat, Belgium. August.

Bernard Castelein / Migrant spreadwing (Lestes barbarus) female at rest, dew droplets on wings. Klein Schietveld, Brasschaat, Belgium. August.

Bernard Castelein / Shy Emerald Damselfly (Lestes barbarus), Klein Schietveld, Brasschaat, Belgium

Robin Chittenden / Southern emerald damselfly or Migrant spreadwing (Lestes barbarus) mating pair, Bulgaria, September

Bernard Castelein / Southern emerald damsefly (Lestes barbarus). Kalmthoutse Heide, Belgium, Europe