So I went again. This time the hawk looked different and scary. I thought that maybe the hawk had gotten sick. I took one photo of it then ran. Its eyes looked yellow. All of its feathers looked black. It was scary looking.
So I left. Later in the week I found out that someone had gotten a good photo of the second bird I saw and identified it as a Peregrine Falcon. Of course the one picture I had of that bird I had deleted after I took one look at it. Never again am I going to get scared of a bird. Instead I will get closer. Then realize, that's not a sick bird. That's a whole different species of birds.