Browsers are the largest animals living in the coniferous forest regions. They feed mainly on young twigs and needles in the summer and subsist on bark, mosses and lichens during the rest of the year. Across much of the Northern Continent the most prolific species are those that are derived from the gigantelopes that originated in Africa. These northern antelope, although much heavier than their distant ancestors, are still not nearly as huge as the African gigantelopes. Only the shaggy tundra-dwelling forms of the far north can compare in size with these.