| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Chroicocephalus | ridibundus | 4658 |
| 2 | Chroicocephalus | philadelphia | 4636 |
| 3 | Chroicocephalus | novaehollandiae | 1770 |
| 4 | Chroicocephalus | scopulinus | 763 |
| 5 | Chroicocephalus | genei | 341 |
| 6 | Chroicocephalus | cirrocephalus | 335 |
| 7 | Chroicocephalus | maculipennis | 224 |
| 8 | Chroicocephalus | bulleri | 219 |
| 9 | Chroicocephalus | serranus | 213 |
| 10 | Chroicocephalus | hartlaubii | 187 |
| 11 | Chroicocephalus | brunnicephalus | 166 |
| 12 | Chroicocephalus | x | 2 |
| 13 | Chroicocephalus | genii | 1 |