Appreciating the subtle and not so subtle physical differences between individuals or subspecies of animals. I'm not an expert, just a person who likes to troll through the internet to find interesting looking animals. Feel free to point out any mistakes. I am not accepting requests at the moment. I do not claim to own any pictures, and will try to link back to the source.

Single mutations of cockatiel (Nymphicus hollandicus)

  1. The normal wild cockatiel is a dark grey bird with areas of white on it’s wings. Males, like the bird on the right, have a bright yellow face and clear orange-red circle on each cheek. Females have duller, faded looking faces, and often have striped tail feathers. [x]
  2. Pastel faced tiels have muted facial markings, making them lean towards light orange or darker yellow, like this bird.[x]
  3. It was very hard to find a yellow cheeked that wasn’t combined with another mutation, so this will have to do. The flash of the camera makes it seem very similar to the pastel, with it’s yellow cheek, though it is probably less bright in natural lighting. [x]
  4. White faced birds lack yellows all together, leaving them with pure white faces. [x]
  5. Pieds have areas of feathers lacking color all together, like this bathing tiel. It’s tail feathers are different colors, neck clean, and wings mostly solid. [x]
  6. Pearl is a pattern mutation where feathers are darkly colored only on the outer edge, giving them a scalloped or laced appearance. [x]
  7. This cinnamon has a lighter body than the wild greys, with almost a soft tint of brown. [x]
  8. Fallow is an even lighter warm grey, these two birds showing off the characteristic red irises of this mutation with the help of the camera’s flash. [x]
  9. A lack of dark pigment in the feathers of the lutino gives this bird it’s (seemingly) pure white body. Most lutinos tend to have a bit of yellow on areas other than their face, since many wild types naturally do, but are masked or mixed in with the grey. [x]

Part two on “cross mutations” coming later.