| Book name (en) | A Monograph of the Trochilidae,or Family of Humming-birds |
| Book volume | Vol.3 |
| Identifier | 3-57 |
| Gould Scientific name | Cynanthus smaragdicaudus |
| Scientific name | Aglaiocercus kingii |
| Gould name (en) | Green-Tailed Sylph |
| Name (en) | Long-tailed Sylph |
| Order | APODIFORMES |
| Family | Trochilidae |
