Come January each year, the Great Migration culminates its southward journey, tracing the eastern fringes of the Serengeti and entering the Ngorongoro Conservation Area. In this region, the plains abound with nutrient-rich grass, offering an optimal environment for the herds to nurture their newborn calves. While the migratory circuit lacks a distinct beginning or end, aside from the perpetual cycles of birth and death, it is rational to designate the wildebeests' birthing season as the commencement of their migration. In late January or February, the herds inhabit the short-grass plains, sprawling across the lower northern slopes of the Ngorongoro Crater highlands and encircling Olduvai Gorge. Remarkably, this period witnesses the birth of around 400,000 calves within a condensed timeframe of two to three weeks, equating to an astonishing influx of nearly 8,000 new calves each day.