The Common Hawker (Aeshna juncea) is not common in Norfolk, being found only in the Easternmost portion of the county. However, its similarity to the Southern and Migrant hawkers may lead to it being under-recorded.
Separated from the Southern by the spots of colour on the last two segments (Southern has bands of colour here) and the narrow ante-humeral stripes (southern's are very broad and clear). Also the common has a yellow costa.
Differentiate it from the migrant hawker by the flight position (the migrant droops its tail in flight, the common and southern hold them straight); the costa is brown in the migrant and yellow in the common (tough call this one); and the common lacks the migrant's yellow triangle on segment 2 (although it does have a narrow yellow stripe in this position). The migrant also has very prominent anal appendages, as long as segments 9 and 10 together, while the common has a more conventional endowment, and the common is a larger insect (but size is a hard thing to gauge). In flight, the migrant displays a conspicuous blue saddle on the side of segments 2 and 3.Error processing SSI file