I am fairly new to chicken keeping, and am still trying to figure out the threats in our area. No dogs roaming (the ones that roamed are all dead), foxes don't come up close to the house, no coyote (yet). My chickens range in our tightly fenced 2 acre yard during the day, and are cooped tightly at night. We have almost never seen a hawk closer than 1000 yards away, down in the pasture where there is a lot of rodent habitat. But this morning I heard one of the hens "bawking" -- loud, single vocalizations that sounded like the beginning of the egg song. I opened the screen slider and watched as a small hawk, probably an immature sharp-shinned or Cooper's, took off from the ground and flew off over the fields. The girls were deep inside a handy forsythia thicket and under no threat. As soon as I came outdoors, they came out and clustered around me; I walked them to the coop, which is under dense pine trees, and has a covered but tiny run, and they started scratching around there. Now they are messing around just beyond our deck, which also offers excellent cover. Do other people's chickens call them when they are in trouble? Red (RIR) knows we will come out and check when she sings her egg song, but she's never used that tone singly before.