Underside of the bird in flight!

Here is the underside of a bird in flight that could use your identification. I knew this needed to be a birdQUIZ after my first misidentification when I hadn’t used my binoculars (I was mainly looking at behavior). But when I finally brought my optics up . . . this bird was then correctly identify by looking at its obvious field marks.

If you saw this bird flying . . . . what would you identify it as?

 EDIT: This bird was photographed in the month of March in New York State.