Raja batis Linnaeus, 1758 – synoniem of Dipturus batis (Linnaeus, 1758)
Rallus aquaticus aquaticus Linnaeus, 1758
Rallus aquaticus Linnaeus, 1758
Ramphastos ambiguus Swainson, 1823
Ramphastos dicolorus Linnaeus, 1766
Ramphastos toco Statius Muller, 1776
Ramphastos tucanus Linnaeus, 1758
Rana temporaria Linnaeus, 1758
Rangifer tarandus (Linnaeus, 1758)
Ranitomeya ventrimaculata (Shreve, 1935)
Raphus cucullatus (Linnaeus, 1758)
Rattus norvegicus (Berkenhout, 1759)
Rattus rattus (Linnaeus, 1758)
Ratufa bicolor (Sparrman, 1778)
Recurvirostra avosetta Linnaeus, 1758
Remiz pendulinus (Linnaeus, 1758)
Rhabdotorrhinus corrugatus (Temminck, 1832) – synoniem of Aceros corrugatus (Temminck, 1832)
Rhacophorus nigropalmatus Boulenger, 1895
Rhea americana (Linnaeus, 1758)
Rhinella marina (Linnaeus, 1758)
Rhynchosauroides peabodyi (Faber, 1958)
Rhyticeros plicatus (Forster, 1781)
Rissa tridactyla (Linnaeus, 1758)
Rollulus rouloul (Scopoli, 1786)
Rostroraja alba (Lacepède, 1803)