Black-winged Stilt (adult with juveniles)

Adult Black-winged Stilts are a "large black and white wader with long orange-red legs and a straight black bill. It has black on the back of the neck, a white collar and a red iris.[(the one at the back)]" Juveniles, or "[y]oung Black-winged Stilts lack black on the back of the neck and have grey-brown wings and back, speckled with white. They have a smudged grey crown, which extends down the back of the neck as the birds get older." (Birdlife Australia)