| Cygnus olor |
| Nederlands | : | Knobbelzwaan |
| English | : | Mute Swan |
| Deutsch | : | Höckerschwan |
| Norsk | : | Knoppsvane |
| Svenska | : | Knölsvan |
| Français | : | Cygne tuberculé |
 |
 |
| Amstelveen, the Netherlands; 25 March 2017. | |
 |
 |
| Nes aan de Amstel, the Netherlands; 26 March 2017. | |
| Cygnus olor |
| Nederlands | : | Knobbelzwaan |
| English | : | Mute Swan |
| Deutsch | : | Höckerschwan |
| Norsk | : | Knoppsvane |
| Svenska | : | Knölsvan |
| Français | : | Cygne tuberculé |
|
|
| Amstelveen, the Netherlands; 25 March 2017. | |
|
|
| Nes aan de Amstel, the Netherlands; 26 March 2017. | |