The Galápagos Tortoise was one of the species Darwin got to nibble on, and that was at the time they were still really available. That's true even though they were already being harvested to keep aboard ships as live food for whalers and pirates. The Beagle took 30 tortoises with it to Polynesia upon leaving the Galápagos islands.
In fact, the tortoises' downfall was that they were so big, meaty, and tasty. They were so yummy that they didn't survive trips to be brought back to Britain for display in zoos. We humans ate them into apparent extinction in a very short time - only traces of them remain in genetic hybrids still alive on the Galápagos.