Least Tern Least Tern, Oak Grove Park, Grapevine, TX, July 27, 2024Canon EOS R5 with Canon 100-500 mm L-series lens with 1.4x teleconverter; 700 mm; ISO-640; f/11; 1/800 sec. This page is for the Least Tern (Sternula antillarum). Least Tern, Oak Grove Park, Grapevine, TX, July 27, 2024Canon EOS R5 with Canon 100-500 mm L-series lens with 1.4x teleconverter; 700 mm; ISO-500; f/10; 1/1600 sec. Least Tern, Oak Grove Park, Grapevine, TX, July 27, 2024Canon EOS R5 with Canon 100-500 mm L-series lens with 1.4x teleconverter; 700 mm; ISO-500; f/10; 1/1600 sec. Least Tern, Oak Grove Park, Grapevine, TX, July 27, 2024Canon EOS R5 with Canon 100-500 mm L-series lens with 1.4x teleconverter; 700 mm; ISO-1000; f/11; 1/1600 sec. Least Tern, Oak Grove Park, Grapevine, TX, July 27, 2024Canon EOS R5 with Canon 100-500 mm L-series lens with 1.4x teleconverter; 700 mm; ISO-1250; f/10; 1/2000 sec. Least Tern, Oak Grove Park, Grapevine, TX, July 27, 2024Canon EOS R5 with Canon 100-500 mm L-series lens with 1.4x teleconverter; 700 mm; ISO-640; f/10; 1/800 sec.