Animals or plants that are far greater in size than normal. For example, on some islands animals become huge, such as the moas of New Zealand, the dodo of Mauritius, the elephant birds of Madagascar, the marine iguanas of the Galapagos Islands, or the Komodo Dragon of the Indonesian Komodo Island. It may be that the islands are free from predators and thus, the prey no longer need to be agile to escape predation, but gigantism may also result from abundant food or reduced competition.