Bonaparte’s Gull (Chroicocephalus philadelphia) October 12, 2018 640 × 480 Bonaparte’s Gull (Chroicocephalus philadelphia) Bonaparte’s Gull (Chroicocephalus philadelphia), March 2012, Montauk. Winter visitor. Early March, 2012. Ditcj Plains, Montauk, Long Island. Lakes and ponds on breeding grounds, coastal waters in winter. Winter visitors.