Also the front cover of this book actually has a Major Mitchel's Cockatoo not a Sulfur Crested. Well, I purchased my copy from a different bookstore website. I like the in-dept information about Cockatoos in general but it greatly lacks details in the sub-species section. It gives you very detailed description about the common sub-species (ex: Goffin, Umbrella, the Yellow Crested Cockatoos aka Sulfur Crested, and Moluccan) found in the US pet trade but the lesser known or extremely rare and expensive Cockatoos (Palm, Gang Gang, and the Major Mitchel's) are just given a vague glance about their appearance and how rare it is to find one as a pet in the common household. I already know how rare it is to find Major Mitchel's (because it took me a year to find a good breeder of MMCs that is breeding and hand raise them to be companion within my state) and I already know how they look, but what I don't know is their personality since Cockatoos don't share all the same traits. Aside form that it has a great, and I mean great section on necessary vitamins and minerals need to maintain your Cockatoo in good health which I'm very please because not all parrot books are as detail with nutrition or the brake down of nutrition.