Peregrine Falcon Feather

Found this feather at the foot of one of the tall buildings here. 

Had an instinctive hunch that it was a falcon feather.  

Went to the U.S. Fish & Wildlife Service Feather Atlas.

You can narrow your search by Unpatterned, Two-Tone, Mottled, Barred, Spotted, Colorful Iridescence, Dark Tip, or Pale Tip. 

And the colour.  

Chose Barred and Gray.  

And the best match I found was....Peregrine Falcon.  

So my hunch was (I believe) right. Maybe I know more about feathers than I think. But, given the size of it, and given the makeup of bird populations in the downtown area, it was a pretty reasonable guess.