The comparison chart below shows the UK’s six “mosaic” hawkers and 2 “brown” hawkers, both male and female, side by side. I’ve included the Emperor Dragonfly/Blue Emperor (Anax imperator) because I have had one instance of it being confused. Unfortunately, I have one female, the Azure Hawker (Aeshna caerulea), missing from my catalog but at least it has a very restricted range.
I’ve used both sets of English language common names.
V1 of this had no annotations but now I’ve squeezed them in to help people focus on which details to look at. For the annotations to be readable, click on the chart to open up a much larger version.