Mourning doves probably wouldn’t move by in those numbers. There are very few around. What to look for on those is a delicate small body, spots on the back/wings and unique pointed tail pattern. They tend to be more light brown than grey. They are quite small compared to the other pigeons and doves here. I was wondering if this was a Eurasian Collared Dove, but it could be a Band-tailed Pigeon too. It’s hard to tell from the front alone.