The African Grey Parrot (Psittacus erithacus), also known as the Grey Parrot, is a medium-sized parrot found in the primary and secondary rainforest of West and Central Africa. Experts regard it as one of the most intelligent birds in the world. They feed primarily on palm nuts, seeds, fruits, and leafy matter, but have also been observed eating snails. Their overall gentle nature and their inclination and ability to mimic speech have made them popular pets, which has led many to be captured from the wild and sold into the pet trade. The African Grey Parrot is listed on CITES appendix II, which restricts trade of wild-caught species because wild populations cannot sustain trapping for the pet trade.
Data refer: http://en.wikipedia.org/wiki/African_Grey_Parrot