dragonflies, a feather...
It also loves a lot the dragonflies and is quite capable to catch them (better than me with the camera).
The Grey Wagtail. [Motacilla cinerea - Passeriformes Motacillidae] (Bergeronnette
It surveys, with its elegant walk and long constantly wagging tail, the riverbanks in search of aquatic insects (attention, larvae and other emergents!) And suddenly flies over the pond in their pursuit.
male has a black throat patch faint in spring.
Pink legs. Gray back and long tail.