How many kinds of talking birds are there?

Some birds can imitate human speech and sounds and are called "talking" birds. The most famous among them is the Parrot family, which includes African gray parrots, macaws, black gray parrots and other species. In addition, some woodpeckers, thrushes, white-cheeked birds, etc. can also learn human language, but the vocabulary they learn is relatively small and it is difficult to achieve the level of fluency like parrots. It should be noted that not all parrots have the ability to learn, and even among parrots of the same species, their individual differences are very large. Some may learn better, while others may not be good at learning languages.