Darwin’s Galapagos Mouse (Nesoryzomys darwini)  

Darwin’s Galapagos Mouse was described in 1929; it was endemic to the Isla Santa Cruz in the Galápagos archipelago.

It reached lengths of about 22 cm, including the tail; it was predominantly cinnamon rufous colored, the upper parts with a mixture of blackish hairs, the tail was dusky above and whitish below. [1]

Darwin’s Galapagos Mouse was last seen in 1930; the species disappeared shortly after, perhaps due to the introduction of Norway Rats (Rattus norvegicus (Berkenhout)), Black Rats (Rattus rattus (L.)), and feral cats.

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References:  

[1] Wilfred H. Osgood: A new rodent from the Galapagos Islands. Field Museum of Natural History 17(2): 21-24. 1929

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edited: 01.06.2021