There are several birds,once common,that have died out in the last few hundred years,so that now not one of them exists.The dodo was quite common on the island of Mauritius 300 years ago,but there is not one alive today.It was easy prey to animals new to the island,because it cold not fly on its smell wings.In New Zealand there used to be birds called moas,which were twice as high as the biggest man.They have all died out.The great auk,which used to came in thousands to the shores of Newzealand,is another bird that has died out in the last few hundred years.