Egret mystery- what is it?

This egret was in the Otagawa heronry on Sunday. I thought at first it was probably just an odd-looking Intermediate Egret, but something about the jizz of this bird suggests that it is something else. The problem is though it doesn't fit any of the other candidates - Great Egret, Little Egret, Cattle Egret, pale-phase Pacific Reef Egret or Chinese Egret.

Mystery Egret 1
Mystery Egret 2

Mystery Egret 3


I have also included some shots of Intermediate Egret, Great Egret and Little Egret taken at the same heronry on the same day.


Great Egret
Little Egret

Great Egrets
Intermediate Egret
Intermediate Egret