Vulture of the future

I am struck a lot by how  black vulture are always in the middle of the garbage and carrion since this is their main food. In 500 years I imagine that the earth is going to be too contaminated with plastic and therefore these beings will develop legs mixed with their current fibers and also with those of plastic. In the same way, I imagine that in the future the vultures will no longer fly because there will not be many trees and they will develop more on the ground and in plastic. Also its beak will change and will be shaped like a plastic knife to be able to feed in a better way