Gull-billed Tern
| Recorded | 2005-04-16 |
| Location | Ebrodelta, E |
| Copyright | Beat Rüegger |
| Recorded | 2017-07-26 |
| Location | Villanueva del Fresno, ES |
| Copyright | Beat Rüegger |
| Family | Terns |
| References | en.wikipedia.org |
493 | 615