| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Actaea | 1 | 1 | 0 |
| Actaea racemosa L. (black baneberry) | 0 | 1 | 0 |
| Aegolius Kaup 1829 | 1 | 2 | 0 |
| Aegolius acadicus (Gmelin & JF 1788) (Northern Saw-whet Owl) | 0 | 2 | 0 |
| Aelophilus | 1 | 2 | 0 |
| Aelophilus fasciatus | 0 | 2 | 0 |
| Aesculus | 1 | 4 | 0 |
| Aesculus glabra Willd. (Ohio buckeye) | 0 | 4 | 0 |
| Aethina | 1 | 2 | 0 |
| Aethina tumida Murray 1867 | 0 | 2 | 0 |
| Afromelecta Lieftinck 1972 | 1 | 1 | 0 |
| Afromelecta lieftincki Eardley 1991 | 0 | 1 | 0 |
| Agapostemon Guérin-Méneville 1844 | 0 | 34 | 0 |
| Agapostemon Guérin-Méneville 1844 | 8 | 34 | 0 |
| Agapostemon angelicus Cockerell 1924 | 0 | 3 | 0 |
