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Rhea Americana
- larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia
Richmondena Cardinalis
- crested thick-billed North American finch having bright red plumage in the male
Rupicola Rupicola
- tropical bird of northern South America the male having brilliant red or orange plumage and an erectile disklike crest
Rupicola Peruviana
- bird of the Andes similar to Rupicola rupicola
Regulus Regulus
- European kinglet with a black-bordered yellow crown patch
Regulus Satrata
- American golden-crested kinglet
Regulus Calendula
- American kinglet with a notable song and in the male a red crown patch
Rocky Mountain Jay
- a Canada jay with a white head; widely distributed from Montana to Arizona
Riparia Riparia
- swallow of the northern hemisphere that nests in tunnels dug in clay or sand banks
Rhyacotriton Olympicus
- small large-eyed semiaquatic salamander of the United States northwest