| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Accipiter badius (Gmelin & JF 1788) | 0 | 0 | 1 |
| Accipiter nisus (Linnaeus 1758) | 0 | 0 | 1 |
| Accipitridae | 10 | 0 | 0 |
| Accipitriformes | 1 | 0 | 0 |
| Aceroides G. O. Sars 1892 | 1 | 0 | 0 |
| Aceroides (Aceroides) latipes (G. O. Sars 1883) | 0 | 0 | 1 |
| Acetabulastoma Schornikov 1970 | 1 | 0 | 0 |
| Acetabulastoma arcticum Schornikov 1970 | 0 | 0 | 1 |
| Achnanthaceae | 1 | 0 | 0 |
| Achnanthes Bory de Saint-Vincent 1822 | 1 | 0 | 0 |
| Achnanthes taeniata | 0 | 0 | 1 |
| Acmaeidae Forbes 1850 | 1 | 0 | 0 |
| Acnanthales | 1 | 0 | 0 |
| Actiniaria | 4 | 0 | 0 |
| Actinopterygii | 6 | 0 | 0 |
