Roseate Tern (Sterna dougalii) August 3, 2020 1200 × 800 Roseate Tern (Sterna dougalii) Roseate Tern (Sterna dougalii), Aug 2016, Napeague. Breeder. DECLINING. Mid-August, 2016. Napeague, Long Island. Shorelines. Summer breeder on Long Island only. DECLINING.