| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Larus | delawarensis | 14763 |
| 2 | Larus | argentatus | 8997 |
| 3 | Larus | occidentalis | 6419 |
| 4 | Larus | fuscus | 5027 |
| 5 | Larus | glaucoides | 4360 |
| 6 | Larus | marinus | 3909 |
| 7 | Larus | californicus | 3759 |
| 8 | Larus | heermanni | 2784 |
| 9 | Larus | canus | 2660 |
| 10 | Larus | hyperboreus | 2559 |
| 11 | Larus | glaucescens | 1879 |
| 12 | Larus | dominicanus | 1838 |
| 13 | Larus | michahellis | 1763 |
| 14 | Larus | smithsonianus | 1255 |
| 15 | Larus | x | 733 |
| 16 | Larus | pacificus | 418 |
| 17 | Larus | schistisagus | 417 |
| 18 | Larus | crassirostris | 407 |
| 19 | Larus | livens | 354 |
| 20 | Larus | cachinnans | 323 |
| 21 | Larus | thayeri | 249 |
| 22 | Larus | belcheri | 148 |
| 23 | Larus | armenicus | 73 |
| 24 | Larus | audouinii | 68 |
| 25 | Larus | atlanticus | 36 |
| 26 | Larus | fuliginosus | 3 |
| 27 | Larus | vegae | 1 |