Gwylan adeinlas: Gwahaniaeth rhwng fersiynau

| p225 = Creagrus furcatus

| p18 = [[Delwedd:Swallow-tailed-gull.jpg|center|80px]]

}}

{{Zutabe formatoa/Familiak

| p225 = Hydroprogne caspia

| p18 = [[Delwedd:Sterna-caspia-010.jpg|center|80px]]

}}

|}