Pictured: A lone zebra joins a herd of wildebeest crossing a river. They are embarking on the great migration which begins in April each year. The animals - more than two million zebras, gazelles and wildebeest - then return on their 1,800 mile round trip in November. SEE OUR COPY FOR FULL DETAILS. Please byline: Keith Cochrane/Solent News ? Keith Cochrane/Solent News & Photo Agency UK +44 (0) 2380 458800