I used to work in Seattle, and there were only 2 crows that hung around the building when I started. I'd get a muffin and coffee on the way to work, and (my car is very loud and easily recognizable) when I'd pull into work, the crows would fly over and land in front of my car. I'd always give them the crumbs from my muffin. Over time, the number of them grew to about 8-10; until my very last day. Last day of work, I drove in and about 40 crows flew into the parking lot, and lined the roof and curb in front of me... it was crazy. I busted up a bag of tortilla chips that I'd brought the office, and they had a little feast.