With its black and white plumage, long, thin red legs, and long neck, the Black-necked Stilt is both striking and delicate in appearance. It is a medium-sized shorebird with a black needle-like bill, black or dark brown upperparts, and a white breast. The iris is red, and there is a white spot above the eye. Breeding males have glossy black wings, back, and back of neck, and a pink tinge on the breast. Non-breeding males lack the glossiness and pink tinge. Adult females have a brown tinge to the back. Juveniles have brown upperparts with buff feather margins, and a white trailing edge to the wing in flight.