A white form which can look very similar to the little egret although the bill tends to be paler and larger.

Egretta gularis (Bosc, 1792), Western Reef Heron, Ras Al Khor, Dubai, UAE, 8 December 2014
Date 8 December 2014, 13:00
Source Egretta gularis
Author Donald Hobern from Copenhagen, Denmark
Source: https://commons.wikimedia.org/wiki/File:Egretta_gularis_(15984612372).jpg

The western reef heron (Egretta gularis) also called the western reef egret, is a medium-sized heron found in southern Europe, Africa and parts of Asia.