There are about 40 flightless birds.. The most common are emus, ostriches, kiwis, turkeys, penguins, rheas. dodo and the smallest, the so-called "Inaccessible Island Rail" this last one is found in the Tristan Archipelago in the South Atlantic. The penguins which are found only in the southern hemisphere prefer to live in islands & continental regions where there's plenty of water and free from land predators. The rest live in scrub and grasslands.