Originally Posted by Cochins Elite
I'm not familiar with all the species of hawks and I had trouble finding info about hawks from my area but most of them are brown or red and varied from a foot tall to a foot and a half and wing lengths of 2-3 ft. some have brown spots on there chest and some have white chest, and the grey or blue one I saw was on the smaller side of what I described on sizes. At my old house I walked out the back slider door and took a few steps forward and one of these blue one's swooped right by my face, seriously like 3 inches from my face.
That got the old heart going.
Blue or gray ones that are relatively small and hunt in close proximity to you are likely either Coopers or Sharp-shinned and they look a lot alike excepting for size. Both are brownish instead of gray during the first year of life and up close adults have almost red eyes.
Others most likely to be Red-tailed.
Bantams are vulnerable to all. Young chickens and hens particularly vulnerable to Coopers unless adult rooster present. Red-tailed is a particular problem even for rooster if not enough cover chickens can retreat to and in my setting rooster can launch counter attacks from.