The Migratory herbs of GNUS & Zebras which left in western side they start to drop their calves and nursing them in Western Serengeti during December to April each year. The western corridor is made up of Open Savanna, woodlands, floodplains, and riverine forest which is home to a great diversity of year-round wildlife, including elephant, giraffe, hippo, giant Nile crocodiles, rare Colobus monkeys and the localized kongoni antelope