The books suggest that these are difficult to distinguish from Orthetrum cancellatum (the Black-tailed Skimmer) though, once seen, I’m not certain they are. O. albistylum males are generally a noticeably paler blue and more lightly built.
If you find our pruinose dragonflies a little confusing, here is an id/comparison chart to help.
- ♂ – white anal appendages; ♀ – white S10 & appendages
- black pterostigma
- mature ♂ – pruinose abdomen with black tip
- mature ♂ – pale bands on side of thorax
- dorsally pale over thorax and between wing roots