Well obviously the 13-year-old
dipshit idiots are having a field
day...
They're birds of the
family Cacatuidae, order Psittaciformes; in other words, they're parrots. They're mostly found in Australia and its surrounding territory. The
mid-sized, yellow-crested, white-feathered bird you see in fiction is just one species, but it is the most common one.
You have a pet cockatiel? That's the smallest genuine species of cockatoo, and the easiest to tame; the others are more difficult to domesticate, and probably not worth your time unless you know your stuff.