Corvids, especially crows, are actually very good speakers!! Generally, crows who frequent suburbs, parks, and especially theme parks are bound to find someone who feeds them. What do we as humans say to greet a curious animal? "HELLO"!! Corvids pick up on this and use it as a way to get attention (and in some cases, FOOD handouts!)
I have a friend in New York who met a friendly crow who didn't hesitate to pop by and tell her "hello!" when she was sitting outside one day. You just never know when one will make himself known
A lucky friend indeed!