Bonaparte’s Gull (Chroicocephalus philadelphia) August 3, 2020 1800 × 1200 Bonaparte’s Gull (Chroicocephalus philadelphia) Bonaparte’s Gull (Chroicocephalus philadelphia), March 2012, Montauk. Winter visitor. With ring-billed gulls (Larus delawarensis). Early March, 2012. Ditch Plains Beach, Montauk, Long Island. Lakes and ponds on breeding grounds, coastal waters in winter. Winter visitors.