These uncommon hybrids were first bred in 1931 by H. Whitley, “his most interesting hybrid Rose-breasted and Lesser sulphur-crested Cockatoo, a striking bird of a silver-grey colour with rusty patches on its cheeks, rusty-yellow tinge over breast, and on the throat and collar, and yellow under the wings”.
Galah x citron-crested cockatoos have a tangerine front with a peach-colored crown, grey bill, and light grey wings. They are visually very similar to galah x sulphur crests, but with more orange coloration and a smaller overall size. Small white or light grey spots may sometimes appear on their wings, potentially due to sun-bleaching. A small, unpublished (to my knowledge) graduate study found that at least four were infertile.
