:Sympetrum frequens

{{Short description|Species of dragonfly}}

{{Speciesbox

| name = Autumn darter

| image = Sympetrum frequens female.JPG

| genus = Sympetrum

| species = frequens

| authority = Sélys, 1883

}}

Sympetrum frequens, the {{nihongo|Autumn darter|アキアカネ|akiakane}}, is a species of dragonfly endemic to Japan. It lives near grasslands and can grow up to 40 mm in length.ふしぎがわかる　しぜん図鑑　こんちゅう, page 36. Froebel-Kan CO., LTD., 1999 After emerging, these dragonflies migrate to high mountains where they feed until descending to breeding pools (often temporary or artificial, including rice fields) at lower levels.