Ardea is a genus of herons. These herons are generally large in size, typically 80–100 cm or more in length.
The great egret (Ardea alba, left) resembles the other Ardea in habitus, and the little egret (Egretta garzetta, right) only in color.
Image: Ardea cinerea Pak Thale
Image: Great blue heron in GWC (21718)
The medium egret, median egret, smaller egret or intermediate egret, is a medium-sized heron. Some taxonomists put the species in the genus Egretta or Mesophoyx. It is a resident breeder in southern and eastern Asia.
Descending to perch, Kabini River, India
Photo showing the size difference in great, medium and little egrets, India