Yellow beak and hawk like yellow tallons I think. They are a little bigger but the yellow makes them pop.

but good luck getting a long look at them unless your in a blind. I have them come to my bird feeders occasionally and they are extremely skittish.
in flight they look to be about a third bigger than a regular pigeon- but this is coming from a guy who spends a lot of time looking at pigeons in the sky. IMO the best way to spot them in flight is they will usually be flying higher than feral pigeons, in ones or twos, traveling quickly in a direct route. they normally perch on tree tops along cliff edge or steep drops. the most distinguishing characteristic for me is they have a really odd wing beat sometimes when they glide, almost like they are wiggling or shimmying their wings while coasting.