Great Migration Calendar: Where the Herds Are, Month by Month

Month by month: where the herds are

January: southern plains, Ndutu area. Calving beginning. Short grass, predators active. February: calving peak. Lion prides and cheetahs work the birth areas around Ndutu continuously. The most intense predator action in the Serengeti calendar. March: herds moving northwest through southern and central Serengeti, green plains, less predictable. April and May: western corridor and Grumeti River. Long rains, fewer vehicles — the Grumeti crossings here are less famous than the Mara but can be dramatic. Large crocodiles, narrow river, fewer competing vehicles.

June: herds column north through the western corridor toward the Mara River, rut begins. July: first Mara River crossings in the northern Serengeti near Kogatende. August: peak crossings. This is the busiest month in the northern Serengeti. September: crossings continue. October: final crossings, short rains beginning, herds start the southward drift. November: central Serengeti, green growth, mixed herds with young animals. December: herds returning to the southern plains; early calves possible.

The practical consequence: a camp in the wrong zone for your month can put you hours from the action. A central Seronera camp works adequately in most months but is 3–4 hours from the northern crossing areas in August — burning your morning and evening game-drive time. Match camp to month.

The calving season: what it is actually like

The calving season is the chapter most people do not plan for, which makes it consistently underbooked and outstanding value relative to the August peak. Between late January and the end of February, 400,000–500,000 wildebeest calves are born on the short-grass southern plains around Ndutu, at the Serengeti’s southern border abutting the Ngorongoro Conservation Area. The reason it happens here: short grass gives calves the best chance of outrunning predators in the first days of life. Wildebeest calves stand within minutes of birth.

On days with active calving the plain is alive with newborns, mothers, and every large predator in the area. Lion prides position near the birth zones; cheetahs sprint after calves within the first week; hyena clans follow through the night. A single morning drive can produce more predator-prey encounters than a week on a quieter African reserve. For wildlife photographers, February and March at Ndutu is the most technically demanding and most rewarding combination the Serengeti offers — flat terrain, dawn light across open grass, and subjects every 50 metres.

Practical camp choice: the Ndutu basin and the southern Serengeti border camps are the right positions. Ndutu Lodge and the seasonal mobile camps that set up in the basin are closer to the calving action. Central camps at Seronera are too far.

The Mara River crossings: the honest version

Thousands of wildebeest on a bank, the decision to go, the plunge, the crocodiles, the chaos on the far side. The window is roughly July to October, peaking August and September. The honest version: crossings are not guaranteed on any given day. Herds gather at the river — sometimes for hours, sometimes for days — before one animal triggers the collective decision. On a 3-night stay in the north during August, most people see at least one crossing. On a 1-night visit, the odds are lower. Book 3 nights minimum.

The northern Serengeti around Kogatende is where this happens on the Tanzanian side. Key crossing points include the Second Crossings area and river bends used year after year. The Tanzanian northern Serengeti generally has fewer vehicles than the equivalent position on the Kenyan Masai Mara side — a meaningful difference if crowd-free viewing matters. Northern crossing camps fill 6–9 months ahead for July and August; book early.

Big cats by season: when and where

Lions are resident across the Serengeti year-round. During calving season (January–February), prides concentrate near the Ndutu basin as easy prey arrives in volume. In the dry season (June–October), lions are more visible because vegetation is shorter and animals concentrate at water. The Serengeti has the world’s largest wild lion population.

Cheetahs are easiest to see on the open short-grass southern plains and around Ndutu, where flat terrain lets them hunt at full sprint. January to March is the prime window, with calves as easier prey and grass short enough for long sight-lines. Leopards are more or less equally distributed year-round but hardest to spot. The riverine woodland around Seronera is the classic leopard zone — a guide with years in that area knows which individual fig trees are used repeatedly at dawn. Wild dogs (African painted wolves) are rare in the Serengeti; the western corridor near Loliondo is the best chance.

The green season and common booking mistakes

The green season (November to early December, and March to May) brings lower prices — often 30–40% below peak rates at the same lodge — green scenery, and fewer vehicles at sightings. Vegetation is higher, making spotting take longer; some mobile camps close in April–May; long-rains tracks in the west can be muddy. For a first safari on a budget, the November–December short-rains window is a strong choice: green growth, mixed herds returning south, and predators in good condition after the long northern summer.

Common booking mistakes worth avoiding: booking a southern camp for August crossings (herds are in the north; you spend 3–4 hours each way driving to them); expecting a crossing on a specific day (it cannot be predicted); choosing a camp that cannot reach the river before 09:00 (the best crossings happen in the first hours after dawn when animals are moving); not asking the operator which season a camp is actually positioned for. Some permanent central camps market themselves as migration camps year-round, which is true in the broad sense but does not mean they are correctly positioned for the crossings.

From Zanzibar, both the February calving window and the August crossing window pair well with time on the east coast. Early game drives at Ndutu or Kogatende, then a flight to the island for the beach — or reverse. That combination is one of the most satisfying East Africa itineraries, and it is one the guests at Boutique Hotel Matlai repeat.