My old flock of guineas could dodge bullets but not cars. They'd play 'chicken' with trucks on the road and I lost them one by one. I'd inherited that group with a bunch of poultry I bought from an elderly lady who was moving in to town. Their racket actually lured up several others (guineas, not old ladies) from who knows where. Those hens would try to nest and set a huge batch of eggs in the weedy fence rows. If anything disturbed them, they were off and running, never to return so I have no idea how chicks ever hatch in the wild.
These 2 new ones are more or less 'chicken trained'. they try to roost with the hens and will come to 'chick chick chick'. So when I can get them close, I scatter something out they'll like. Two guinea hens can make a heck of a racket, i can't imagine how I ever stood 30+ of them! By nature, a guinea is somewhere between an always-wild pheasant and a pleasantly tame chicken. There are the exceptions, those handled a lot from Day 1 can turn into unique pets, but they're not common. When they peck holes in the tomatoes and peppers and leave them, I think they're pecking at the shiny guinea image they see in passing. They don't actually eat the fruit but they can ruin it just as bad. A guinea's saving grace in the garden is they don't scratch up bare dirt (and tender young seedlings) as much as a chicken.