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.