John & Carol Curd
There are 6 species of Mosaic Hawkers in the UK.
One of the more useful distinctions can be the pattern on the side of the thorax but there are other features for occasions when that may not be visible.
Southern Hawker/Blue Hawker (Aeshna cyanea)
Southern Migrant Hawker/Blue-eyed Hawker (Aeshna affinis)
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