Willards Island, Hammo. Bird popped up from the brush on middle trail halfway between start and the large oak. Grayish drab above and fainter yellowish below. Saw the bird briefly but the eye ring was prominent and looked complete, though I can’t completely rule out Mourning. Bird flew low through woods towards West trail. Could not relocate. Also Cape May, Blackburnian, Prairie, and Magnolia warblers on the island.