As the others said, food. Specifically unsalted cashews. I called our (Dutch) bird rescue center and they said that’s the healthiest “human” food to give them.

I have three crow friends (and sometimes their buddies) who light on my balcony railing and wait for me to come out. One will eat it there while I’m watching; the other two fly it across the street to their stashes. All three will just sit on the railing and watch me work sometimes.

Sometimes the magpies show up, but they are super, ultra cautious around The Human. I can tell they know me though when they fly through the street. They make the happy magpie sound they make to their mates when one of them steals a cashew intended for the crows instead of being silent.

I get that this is illegal, but you do not have to give them a lot or make it obvious . One or two a day. You may not see them, but they will see and remember you as Cashew Guy/Gal/Nonbinary Pal.

Also alas, Unidan, where did you go?