The Serengeti ecosystem in Tanzania is home to the annual wildebeest migration, a cyclical event that takes place throughout the year. Here's a breakdown of the wildebeest ecosystem in Serengeti by a period of the month:

January-March: During this period, the wildebeest herds are mostly concentrated in the southern part of the Serengeti, around Ndutu and Lake Masek. This is the calving season, and the herds gather in large numbers to give birth to their young. The grass is lush and green in this area due to the recent rains, providing ample grazing for the wildebeest.

April-June: As the dry season sets in, the wildebeest begin to move northwards towards the central Serengeti and the western corridor. This period is characterized by long, dry grass and scattered water sources. Predators such as lions and hyenas are more active during this period, preying on the weaker members of the herds.

July-October: This is the peak of the migration season, as the wildebeest cross the Grumeti River and then the Mara River into Kenya's Maasai Mara National Reserve. The herds are concentrated in the northern part of the Serengeti during this period, and the river crossings are a dramatic sight, with crocodiles and predators waiting to ambush the herds.

November-December: The wildebeest start moving southwards again, back towards the southern plains of the Serengeti, as the short rains start to fall. The grass begins to grow again, providing fresh grazing for the herds.

Overall, the wildebeest ecosystem in the Serengeti is a dynamic and ever-changing environment, shaped by the seasonal movements of the herds and the interactions between different species