ocr: 21 Dodo - - - - - - L SOME TIME IN THE DISTANT PAST, A FLYING ANCESTOR OF the dodo found its way to an isolated island in the Indian Ocean called Mauritius. The island was a perfect home: there was plenty to eat and there were no predators, SO the ability to fly was no longer an advan- tage; the birds could do just as well by staying on the ground. Flying, which takes a lot of energy, is an expensive investment, biologically speaking. Iti is more economical" to stay on the ground. Eventually a flightless dodo emerged. Things were fine until around 1600, when sailors began using Mauritius as a ...