Yeah if you find some and give food, you should try to go every day at around the same time, if possible. They are good at learning routines and will remember you pretty quickly.
I made friends with some park crows like this. They are pretty comfortable with me now but still can't hand feed them or anything like that
Fucking crows are too smart. They have trained me to leave them sunflower seeds in return for alerting me anytime someone approaches my house. Fuckers.
My cousin had a tame crow who he had fixed a broken wing on and it just moved into the barn and never left. He would stand in the driveway and bellow HELLO at anyone who pulled in, and then demand you feed him some muskmelon. Eventually he got cataracts and the local veterinary university program offered to remove them, he lived like twenty years. Funny bird.
Cute story, not that's not how crows behave. They immediately distrust any random human who interacts with one of their dead in any way, and they share their knowledge of who they dislike with their offspring for generations.
They also wouldn't think to bring a flower in particular but would instead bring something of significance to them, such as a shiny object, a nice rock, or some other random small thing.
I've been feeding my local crows roasted peanuts for a couple of years now. They've never given me shit as a present, ungrateful little bastards. One time I thought they left me a little cluster of seeds and berries as a present and I was happy, but then I realized one of them just puked that up so he could eat the peanuts.
I tried to befriend 3 crows that are always in my yard. This past winter, I put a packet of large nuts out for the 3 that are always there. The next day there was a crow staring in my bedroom window at me. So I put more out. Later that afternoon, a mob of crows were in my yard. My driveway and car was covered in poop.
I was once told that Magpies are the stupidest birds in existence because if you hit one with your car, others will gather around the body and also get hit by cars.
That sounds more like Pheasant behavior. Remarkably stupid birds.
Edit: apparently, the "pheasants are stupid" reputation is due to an alarming number of them being selectively bred for the express purpose of being dumb and easy to shoot, being released into the wild. TIL.