A raptor tried to take my head off yesterday

Walking to Wiehle-Reston Metro, I was cutting across a lightly wooded office park when something hit the top of my head, hard and sharp.

I touched my head, and my hand came back slightly bloody.

There wasn't anyone else around. At first I thought I got hit by a chunk of ice or falling branch, but there had been no noise and nothing on the snowcrete near me.

The only thing moving was in the air. A bird, I guess a hawk, landed in a tree maybe 100 yards away. (I wasn't quick enough to get a photo before it took off again.)

I wasn't wearing a hat, and my hair is salt-and-pepper (if the pepper is white pepper), so I figure the bird thought my head was a weird squirrel or rabbit and tried to grab it.

I took a photo of the top of my head: 

 

Then again at Metro:

 

I could see the oddly square bloodstain on the top left of my head, but there wasn't any major bleeding or gaping wound, so I continued on into DC.

 

Edit: Seems equally possible that it was an owl, possibly after I got too close to its nest or territory. Definitely not a bat.

[I originally posted this to Facebook and Reddit; just wanted it on a platform I control. Mostly.]