Every year during the great migration about 1.3 million wildebeest, together with 200,000 zebra<\/a><\/strong> and half a million Thomson’s gazelle<\/a><\/strong>, move around the ecosystem \u2013 over 2 million animals in all.<\/p>\n They all converge on the plains in the wet season because that is where the best food is. The grasses of the plains have the highest protein content in the whole of Serengeti, but they are also high in calcium and phosphorus.<\/p>\n The animals move around the plains following the rainstorms and the growth pattern of grasses.<\/p>\n The three migrant grazers, however, stick to themselves with only a small overlap in their distributions, taking advantage of the different heights of grass.<\/p>\n<\/div>