Yellow-crested cockatoo BEHAVIORS IN WILDLIFE: The crested cockatoo Sulphur-crested cockatoo is common in most of its habitat. Outside the breeding season, these noisy birds congregate in large groups to feed on meadows, bushes, and trees. The Yellow-crested Cockatoo may also tackle large coconuts (Cocos nucifera) for food. They feed on seeds, fruits, hearts of palm trees and insects. Programs & Projects WPT has worked with numerous partners to help save this species. They sport a beautiful crest of yellow feathers on top of their heads. Sulphur-crested cockatoo. Yellow-crested cockatoo are primarily white with black beaks.