| Common Name | Scientific name |
|---|---|
| Long-tailed Jaeger | Stercorarius longicaudus |
| Long-tailed Manakin | Chiroxiphia linearis |
| Long-tailed Rosefinch | Carpodacus sibiricus |
| Long-tailed Sabrewing | Campylopterus excellens |
| Long-tailed Shrike | Lanius schach |
| Long-tailed Silky-flycatcher | Ptiliogonys caudatus |
| Long-tailed Tit | Aegithalos caudatus |
| Long-tailed Tyrant | Colonia colonus |
| Long-tailed Widowbird | Euplectes progne |
| Long-tailed Wood-Partridge | Dendrortyx macroura |
| Long-tailed Woodcreeper | Deconychura longicauda |
| Long-toed Stint | Calidris subminuta |
| Long-winged Harrier | Circus buffoni |
| Lord Derby's Parakeet | Psittacula derbiana |
| Louisiana Waterthrush | Parkesia motacilla |
| Lovely Cotinga | Cotinga amabilis |
| Lucifer Hummingbird | Calothorax lucifer |
| Lucy's Warbler | Oreothlypis luciae |
| MacGillivray's Warbler | Geothlypis tolmiei |
| Macqueen's Bustard | Chlamydotis macqueenii |
| Magellanic Goose | Chloephaga picta |
| Magenta-throated Woodstar | Calliphlox bryantae |
| Magnificent Frigatebird | Fregata magnificens |
| Magnolia Warbler | Setophaga magnolia |
| Magnolia de Hernan | Magnolia hernandezii |
RingBase adheres to EURING codes.
