Western reef heron

The western reef heron (Egretta gularis), also called the western reef egret, is a medium-sized heron found in Africa and parts of Asia, with vagrancy occurring in Europe and the Americas. It has a mainly coastal distribution and occurs in several plumage forms: a slaty-grey plumage which can only be confused with the rather uncommon dark morph of the little egret (Egretta garzetta); a white form which can look very similar to the little egret, although the reef heron's bill tends to be paler and larger; and a black form with a white throat, E. g. gularis, found in West Africa. There are also differences in size, structure and foraging behaviour. There have been suggestions that the species hybridizes with the little egret, and based on this, some authors treat schistacea and gularis as subspecies of Egretta garzetta. Works that consider the western reef heron as a valid species include the nominate gularis and schistacea as subspecies.

Description

This bird has two plumage colour forms. There is an all-white morph and a dark grey morph; morphs can also occur with intermediate shades of grey which may be related to age or particoloured in grey and white. The white morph is similar in general appearance to the little egret, but has a larger yellower bill, extended yellow on thicker legs, and when foraging tends to be very active, sometimes also moving its wing or using it to shade the water surface. The grey morph has a whitish throat and is unlikely to be confused with any other species within the range of this egret with beak and legs similar to that of the white morph.