Sulphur-Crested Cockatoo Colors and Markings Sulphur-crested cockatoos are largely white with black beaks. They sport a beautiful crest of yellow feathers on top of their heads. It's a yellow clean on the underside of its wings. It's important not to overfeed your cockatoos, as they are vulnerable to obesity. https://valeriust615amy4.thelateblog.com/profile