Green-backed Heron, Seeing off a Family of Duck

ササゴイの前をカモの親子が通過しました。

I went a river to check arriving Green-backed Heron, one of my favorite summer bird. I could find 3 birds there, and the one waited for "a" fish （because I only have one fish in its own beak!）without moving. After a while, a duck family passed in front of the bird.

I didn't know if the ducklings had noticed, on the other hand the Green-backed Heron has narrowed its own body, probably a little bit nervous.