Citron-crested Cockatoo Cacatua sulphurea citrinocristata.Lesser Sulphur-crested Cockatoo Cacatua sulphurea sulphurea, also know as the Yellow-crested Cockatoo.Umbrella Cockatoo Cacatua alba, also known as the Umbrella-crested, White-crested, or Greater White-crested Cockatoo.Frequently kept types of cockatoos include: Types of Cockatoos: There are 18 species of cockatoo (including the well-know cockatiel) and 37 sub-species, of these only a handful became well known due to importation restrictions.DNA testing is done usually with a blood sample or a few plucked feathers that are sent to be diagnosed in a lab. Endoscopy can be done by many veterinarians. On these birds, the sex must be determined by either a surgical probe, endoscopy, or by a DNA testing. However the eye coloration is not so pronounced on some species. This helps to determine the sex of the bird. Sex Differences: On most species of Cockatoo, the eye iris of the female will become red to red-brown after about two years. Cockatoos are thought to be the longest lived of all parrots with examples cited of the Greater Sulphur-Crested Cockatoo having lived over 100 years.
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