Parrot Cages by Size
Your parrot needs the largest cage you can afford.
Small birds need roomy cages with small bar spacing. Larger birds need large cages with slightly wider bar spacing (but heavier gauge).
Budgerigars (also known as Budgies or simply Parakeets in the U.S.) - 1/2" spacing
Cockatiels and small conures -- 1/2" inch to 5/8" spacing
Larger conures, caiques, mini macaws - 5/8" to 3/4" spacing
Amazons and African Greys -- 3/4" to 1" spacing
Macaws -- 1" bar spacing
Cockatoos -- 1" bar spacing