The Great Migration in Tanzania typically occurs from late December to October. The migration begins in the southern Serengeti, where the wildebeest and other animals calve between January and February. By June, the herds start moving north toward the Grumeti River, with dramatic river crossings happening in July and August. The migration gradually returns south by October as the anim... https://www.gondwanaecotours.com/travel-journal/when-is-the-great-migration/