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With the availability of the Whiteface mutation, the cockatiel's wide colour varieties are divided into 2 main classes (or series): Yellow base: with psittacofulvin (yellow and orange) pigments. White base: without psittacofulvin pigments; Some white-faced cockatiels have entirely white bodies and red eyes.
The "albino" cockatiel also known as the whiteface lutino, is not the result of albinism. It is a breed that combines two genes of whiteface and lutino. The "Whiteface gene" removes all the yellow and orange that would be present in a Lutino, and the "Lutino gene" removes all the black and grey. So it has all white plumage, red eyes and pink ...
Male grey cockatiels typically have yellow heads while the female has a grey head. Juveniles tend to look like females with pinker beaks. The pied mutation first appeared in California in 1949. This mutation is a blotch of colour on an otherwise solid-coloured bird. For example, this may appear as a grey blotch on a yellow cockatiel.
The plumage is overall white, while the underwing and -tail are tinged yellow. The expressive crest is yellow. The bill is black, the legs are grey, and the eye-ring is whitish. Males typically have almost black eyes, whereas the females have a more red or brown eye, but this requires optimum viewing conditions to be seen.
The Pied cockatiel is the first mutation of cockatiel colour genetics, with a mostly grey to light-yellow and white feathers and orange cheek patches.. Pied cockatiels have large, random blotches of colour on their bodies, after the "normal grey" or "wild type" of a cockatiel's plumage is primarily grey with prominent white flashes on the outer edges of each wing.
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The body feathers are edged with yellow giving a scalloped appearance. The adult male has a black beak and pinkish-red eye-rings, and the female has a bone-coloured beak and grey eye-rings. In flight, yellow-tailed black cockatoos flap deeply and slowly, with a peculiar heavy fluid motion. Their loud, wailing calls carry for long distances.
The "albino cockatiel" is not a true albino, it is a combination of a "white-faced cockatiel" and a "Lutino cockatiel". The "Whiteface gene" removes all the yellow and orange that would be present in a Lutino. and the "Lutino gene" removes all the black and grey. The result is an all white cockatiel with red eyes. [4]