Nesoryzomys darwini, the Darwin's nesoryzomys, Darwin's rice rat or Darwin's Galápagos mouse, a rodent species
Berthelinia darwini, a snail species in the genus Berthelinia found in the Houtman Abrolhos
Gryllus darwini, Otte & Peck, 1997, a cricket species in the genus Gryllus