The Eastern reef egret is a bird of mud flats, reefs and rocky beaches. There are two colour forms, a white one and the dark form see here. The white form is more common in the tropics. More often seen in warmer waters. This species is also found in SE Asia, PNG, NZ and the SW Pacific. It is more ‘sulky’ than the other smaller egrets found in Australia. In this film the bird is using its wing to provide shade to attract little fish and the like.