Cage birds are a popular type of pet, and there are three common species: the CANARY (6 letters), PARAKEET (8 letters), and COCKATOO (8 letters). Canaries are small, yellow-colored birds that are known for their singing. Parakeets are small, colorful birds that are known for their intelligence and ability to mimic human speech. Cockatoos are larger, white birds with distinctive crests on their heads, and they are known for their loud calls and playful personalities. All three of these birds can make wonderful pets when kept in a cage and provided with proper care.