DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY DR. JOHN BRACKENBURY / SCIENCE PHOTO LIBRARY
Emperor dragonfly (Anax imperator) resting on a stem. Also known as the blue emperor, this is one of the largest dragonflies in Europe, averaging 7.8 centimetres in length. Photographed in the Canary Islands.
Model release not required. Property release not required.