Labels:text | screenshot | font OCR: cause if food is not available in one area, they move to another. Their movement also helps reduce the torment of bot and warble flies which descend on caribou herds in massive droves. In summer, caribou eat a wide variety of plants, favoring leaves of willow and dwarf birch, grasses, sedges, and succulent plants. When frosts kill the foliage, caribou switch to lichens and dried sedges. Annual caribou migrations are directional, long-distance treks. In spring and early summer, cows and young move first to traditional calving grounds and then to summering areas. Bulls and some younger animals follow far to the rear. In fall and early winter, the herd assembles for mating, also known as the rut, and then moves to wintering grounds. In May and early June, the caribou that have wintered in the ...
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