Other birds do as well. They all pay attention to each other. I have a very active set of bird feeders in a rural area (so many species of birds and other anima

Other birds do as well. They all pay attention to each other. I have a very active set of bird feeders in a rural area (so many species of birds and other animals use them at the same time). I am within sight to it for much of the day and it's very clear that they all cue off of each other. Some are more brave, others more timid but they all pay attention. A chipmunk or bird fight won't phase the others but a cat (or person or hawk overhead) will cause the birds to make what is, for some of them, a very clearly different call (usually loud and abrupt) and they all react at the same time.