Ключевые слова: adorable, adult, animal, background, beak, beautiful, biology, bird, birds, cage, cockatiel, colorful, creature, crest, crested, cute, decoration, exotic, feather, feathers, freedom, gray, grey, head, healthy, illustrations, isolated, male, nymphicus, one, parrot, pet, portrait, space, tame, tropical, wild, wing, yellow,