| Common Name | Scientific name |
|---|---|
| Tundra Swan | Cygnus columbianus |
| Whooper Swan | Cygnus cygnus |
| Black-necked Swan | Cygnus melancoryphus |
| Mute Swan | Cygnus olor |
| Fasciated Antshrike | Cymbilaimus lineatus |
| Broad-billed Hummingbird | Cynanthus latirostris |
| Dusky Hummingbird | Cynanthus sordidus |
| Song Wren | Cyphorhinus phaeocephalus |
| Spot-fronted Swift | Cypseloides cherriei |
| White-chinned Swift | Cypseloides cryptus |
| Black Swift | Cypseloides niger |
| White-fronted Swift | Cypseloides storeri |
| Montezuma Quail | Cyrtonyx montezumae |
| Ocellated Quail | Cyrtonyx ocellatus |
| Blue Dacnis | Dacnis cayana |
| Scarlet-thighed Dacnis | Dacnis venusta |
| Viridian Dacnis | Dacnis viguieri |
| Singing Quail | Dactylortyx thoracicus |
| Long-tailed Woodcreeper | Deconychura longicauda |
| Common House Martin | Delichon urbicum |
| Flammulated Flycatcher | Deltarhynchus flammulatus |
| Sooty Grouse | Dendragapus fuliginosus |
| Dusky Grouse | Dendragapus obscurus |
| Tawny-winged Woodcreeper | Dendrocincla anabatina |
| Plain-brown Woodcreeper | Dendrocincla fuliginosa |
RingBase adheres to EURING codes.
