This Sheldon Cooper screencap contains
cockateel, cockatiel, kakadu papagei, nymphensittich, cockatoo papagei, nymphicus hollandicus, and papagei kakadu.
There might also be
sittich, parrakeet, parroket, paraquet, paroquet, parroquet, parakeet, parroke, liebesvogel, lovebird, amazonas, and amazon.