A pediatric nutritionist is a registered dietitian (R.D.) that has specialized in nutrition for children, so you must first become a registered dietitian. You could enroll in a bachelor's degree program accredited by the Commission on Accreditation for Dietetics Education.
Here is part 1 of Cockatiel Types and Descriptions which covers 5 types of cockatiel types including whiteface, lutino, albino, normal greys, and pied. Each ... Here is part 1 of Cockatiel Types and Descriptions which covers 5 types of cockatiel types including whiteface, lutino, albino, normal greys, and pied. Each slide gives a bried description of what each type looks like, and includes a photo. Please watch part 2 for more types. Thanks for watching. :) I own none of the photos shown in the following video.
Except for the Budgerigar, the Cockatiel is rated as the most popular and widely kept of the approximately 340 species of the order of psittacine birds. They are a hardier bird than their rival, the Budgie, and have a life span of 15 to 20 years versus the Budgie's 7 to 8. They are gentle and sociable by nature and have pert, bright personalities. They quickly pick up words and phrases and especially love to whistle.