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. Early March, 2012. Ditch Plains Beach, Montauk, Long Island. Lakes and ponds on breeding grounds, coastal waters in winter. Winter visitors.