Herons in the ditch

 I took a break from searching waders and watched the scene of arguing herons for a while. Who was in there? Grey Heron, アオサギ; Great Egret, ダイサギ; Intermediate Egret, チュウサギ; Little Egret, コサギ; Cattle Egret, アマサギ and... who is that dark looking one?

There you are again, Juvenile Black-crowned Night Heron, ゴイサギ