Mating pair periodically dipping down to lay eggs.
A lot of them around the lake. Variously pictured: a male eating a female Common Whitetail (and a blurry shot of him snatching her off the lake), a female ovipositing in mud cracks at the water's edge, and a mating pair with the female ovipositing off alternate sides of the reed they're perched on.
We watched a male patrolling over a female ovipositing in the lake, until she was snatched up by a Common Green Darner and carried off to the bushes to be eaten head-first!
Chased these guys for a week, then he landed on a tree right in front of me
Lots of these little pink-red fellows in the tule.
Common at lake edge, landing on bulrush.
Odonata is an order of carnivorous insects, encompassing dragonflies (Anisoptera/Epiprocta) and damselflies (Zygoptera). The word dragonfly is also sometimes used to refer to all Odonata, but odonate is a more correct English name for the group as a whole. Odonata enthusiasts avoid ambiguity by using the term true dragonfly, or simply Anisopteran, when referring to just the Anisoptera. The term Warriorfly has also been proposed. Some 5,900 species have been described in this order.