The frequency of sounds that parrots can make is usually close to the average frequency of the female voice, and therefore some species of these birds are often not able to imitate the male speech quite plausibly. Driven by a natural desire to imitate, they can play other sounds, including a ringtone or dog barking. This is partly due to the fact that in the natural habitat, young parrots try to make the same sounds as older birds, but in a human house they are deprived of a society of their own kind and forced to imitate everything they hear.
It is interesting that some parrots can speak for a specific purpose: for example, in this way they try to attract the attention of a person or expect to receive a reward. These birds are unusually quick-witted, and some of them can remember whole sentences or even short texts. The causal relationship they have developed very well, so parrots quickly notice the reaction of people to certain words and remember it. Thanks to a number of experiments conducted, scientists were able to find out that parrots are able to not only pronounce words, but even understand what they mean. So, gray African parrots, which are famous for their ability to perfectly imitate human speech up to intonations, can remember the names of more than a hundred objects and even understand which word means what. If you give such a parrot a treat for every thing he correctly named, he will very quickly learn to speak.
In the wild, like all other representatives of birds, parrots communicate with each other in their "bird language". When they get to people, they begin to imitate the sounds they hear around them, that is, human speech. But still, this question is causing a lot of interest, therefore, today there are many assumptions and theories.
According to most biologists, parrots speak purely mechanically. But all the same, their ability can be called outstanding, because most birds do not repeat anything at all. Some people think that parrots can speak thanks to a large and thick tongue, which is somewhat similar to human language. But this statement is doubtful, because hawks or falcons have the same tongue structure as a parrot, but for some reason they are silent, and some species of birds with a small tongue (for example, a tropical starling) can be quickly learned to pronounce individual words.
Another common opinion is the assumption that human and bird speech (in our case, parrots) is similar to each other. That is why a multi-colored pet is simple and easy to imitate fragments of human conversation or words from a favorite song.
It is possible that with the development of science, scientists will give an exhaustive answer to the question of why parrots reproduce human speech. However, today there is no single answer; there are only versions.