Reviewing old photos I discovered a possible Sabine Gull. The quality picture is very bad but the wing pattern I think is more or less clear... And I think swallow-tailed gull show less black. Comments are welcome!
Picture from Isla de la Plata (Ecuador) in August seeing humpback whales.
Thanks!
Picture from Isla de la Plata (Ecuador) in August seeing humpback whales.
Thanks!