Y'all should Google the article, it’s actually pretty neat. Basically, the Aldabra Atoll was once inhabited by the Aldabra Rail, a flightless species of bird that had diverged from the flying White-Throated Rail when a section of the population landed there and found they had no natural predators. However, the Atoll occasionally gets completely submerged, and all of the flightless Aldabra rails were wiped out. But then, after the Atoll re-emerged, a bunch of the EXACT SAME species of flying White Throated Rail decided to settle there again, and immediately proceeded to evolve into flightless birds AGAIN.
