Mary spotted this critter atop the roof and, much to my surprise, it waited courteously until I deployed the camera:

It looks, walks, and acts just like a pigeon:

… but we’ve never seen one with those feather patterns & colors. It’s not in any of our books, so it may be an escaped domestic pigeon.
Those feathers require plenty of body maintenance:

As nearly as we can tell, it’s wearing a green leg band with three digits that might be 904:

If this was your bird, it flew through Red Oaks Mill NY just after noon on 1 May 2017 …