Dragonfly

Dragonfly

Observation - Dragonfly - UK and Ireland. Description: I think this is a male Southern Hawker. It has 1 black wing spot on the top of each wing, not apparent in the photo. The tail segments have blue triangles one on each side with 2 thicker bands at the bottom. At the end of the tail there are 3 protrusions

I think this is a male Southern Hawker. It has 1 black wing spot on the top of each wing, not apparent in the photo. The tail segments have blue triangles one on each side with 2 thicker bands at the bottom. At the end of the tail there are 3 protrusions (I think there are only 2 on a female) Could someone tell me what these are or?