I'm currently in Spain, where these "palomas verdes" - as a little boy referred to them - were abundant in some places. Escaped Monk parakeets / Mönchssittiche (Myiopsitta monachus) have established big populations and mingle with the Feral pigeons in the cities. Check out how it uses its feet! Most parrots are zygodactyl, meaning that they have one reversed toe. Two point to the front, two to the back. This is i.e. also seen in many woodpeckers or owls. But bringing food to the bill with the feet is usually not seen in other birds than parrots.