| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Aix Boie & F 1828 | 1 | 0 | 0 |
| Aix sponsa (Linnaeus 1758) (Wood Duck) | 0 | 0 | 1 |
| Alaria Greville 1830 | 1 | 0 | 0 |
| Alaria esculenta (dabberlocks) | 0 | 0 | 1 |
| Alariaceae | 1 | 0 | 0 |
| Albionella | 1 | 0 | 0 |
| Neoalbionella fabricii | 0 | 0 | 1 |
| Alca Linnaeus 1758 (Lesser auk) | 1 | 0 | 0 |
| Alca torda Linnaeus 1758 (Razorbill) | 0 | 0 | 1 |
| Alcidae (auks) | 5 | 0 | 0 |
| Alcyonacea Lamouroux 1812 (soft corals) | 1 | 0 | 0 |
| Alcyonidiidae Johnston 1837 | 1 | 0 | 0 |
| Alcyonidium J. V. F. Lamouroux 1813 | 1 | 0 | 0 |
| Alcyonidium diaphanum | 0 | 0 | 1 |
| Alcyoniidae Lamouroux 1812 | 1 | 0 | 0 |
