Sombre goldenring

Description

Cordulegaster bidentata,also known as sombre goldenring or two-toothed goldenring,is a species of dragonfly in the family Cordulegastridae.This species is identifiable by its black body and yellow rings.Adults are approximately 8 centimetres (3.1 in) in body length with a 10 centimetres (3.9 in) wingspan,and have a similar appearance to the related species Cordulegaster boltonii.