Inner hole 4.5mm:
Big head budgerigar, Lovebird, Pacific Parrotlet, Barred Parakeet, Butcher birds
Inner hole 5.5mm:
Cockatiel, Sordid Conure, Rosellas, Red-rumped, Crested Myna, Turtle Dove, Fig
Inner hole 6.5mm:
Sun conure, Jandaya Parakeet, Platycercus eximius, Monk Parakeet, Red-billed Parrot, Small Red-breasted Parakeet, Eurasian Jay
Inner hole 7.5mm:
Pionites, Rose-ringed parakeet, Senegal parrot, Meyer's Parrot, Red-shouldered Macaw
Inner hole 8.5mm:
Big Pionites, Blue-headed, Scaly-headed, Living Rainbow, Dusk, Pionus
Inner hole 9.5mm:
Alexandrine Parakeet, Small Yellow-crested Cockatoo, Big Red-breasted Parakeet, Mitred Parakeet, Jardine's Parrot
Inner hole 11.5mm:
African Grey , Eclectus , Medium Yellow-crested Cockatoo
