In my early days of being a dragonfly obsessive, I well remember studying every Blue-tailed Damselfly (Ischnura) in the hope that I would stumble across my first Scarce Blue-tailed Damselfly (Ischnura pumilio). That was before I learned that habitat was paramount.
There are those that find the differences between the males confusing so here is what I hope is an explanatory diagram.
