Mourning doves are like the least situationally aware birds in existence. My parent's bird feeder will have upwards of two dozen birds on and around it (there is a bath there as well) and often at least two or three squirrels. Sooooo often EVERYTHING would vanish, except the couple doves that are there. It's obvious to me, in the house and twenty feet from the window that a hawk is around, but they can't figure it out while they're actually out there...