Matamata tortoise Small 320×98 Medium 640×196 Large 1024×314 Download Tiff Original 2400×736 | (975.3 KB) Description Primarily nocturnal, the matamata tortoise of South America feeds on small reptiles and fish. Keywords Chelonia, guiana, Reptile, South America, Tortoise, turtle Galleries Turtles Source: S. G. Goodrich Animal Kingdom Illustrated Vol 2 (New York, NY: Derby & Jackson, 1859)