For me the best example of that is Switzerland, although naturally this might happen in other places as well.
Basically sparrows are so used to humans that they don't have any problem landing on a table while people are still there, while trying to see if they get something out of us.
Some of them even adopt dog like behaviors, jumping left and right or making small noises, as if begging for some food.
I was once on the balcony of the cafe at the modern art museum in Sydney, Australia, quietly drinking some coffee. A bright red bird landed on my table and was eyeing me closely.
I was thinking, "What in the world does this bird want? I don't have any food, and why would a bird want coffee?"
I figured out the answer. He made a bold grab for the sugar packet. It was too heavy to fly off with, so he just dragged it away from me, opened it, and ate it while I continued to drink my coffee.
Basically sparrows are so used to humans that they don't have any problem landing on a table while people are still there, while trying to see if they get something out of us.
Some of them even adopt dog like behaviors, jumping left and right or making small noises, as if begging for some food.