Common Darter Dragonfly (Sympetrum striolatum) male resting on bullrush, Oxfordshire, UK

sympetrum terrestrial bullrush animals horizontal male anisoptera lakes insects odonates darters ectotherms dragonfly developed country bugs arthropoda uk lake ectothermic europe aquatic water red dragonfly arthropods dragonflies pond nature united kingdom zoology developed countries water european ectotherm dragonflies europe fauna horizontals invertebrate wildlife cold darter entomology odonate insect resting british england pond uk britain blooded wetland libellulidae striolatum insecta wetlands arthropod english odonata oxfordshire insect invertebrates ponds bug animal