I've seen Blue Jays do something similar, it started off as a single male jay dive bombing the hawk with 2-3 more Jays showing up in a few minutes. It occurred

I've seen Blue Jays do something similar, it started off as a single male jay dive bombing the hawk with 2-3 more Jays showing up in a few minutes. It occurred to me that the birds must have a "flee" call that's distinct from a "help" call because while they seemed to want to scare away the hawk I've seen them simply flee when a cat's around.