Our backyard got an unwelcome visitor. My big son let the chickens out to search the yard for various things they like to eat (which includes vegetables). My kids like to let them run free from time to time.
Well, some sort of bird of prey swooped down and tried to grab one. My son does not know the differences between Falcons, Hawks, and Eagles, but it was some sort of big bird of prey.
Luckily the chickens saw it coming, scattered out of the way, and it didn't come back for a 2nd try, probably intimidated by my son.
There's a reason I build their coop to be totally enclosed, including their little yard run.