The Great Migration: Where, When and How to See It

The Great Migration is the largest overland animal movement on Earth: 1.5 million wildebeest (also called gnu), 250,000 zebra, and 500,000 Thomson's gazelle moving in an endless clockwise circuit through the Serengeti-Mara ecosystem — a 40,000 km² system spanning northern Tanzania and southern Kenya.

The movement is driven entirely by rainfall and the grass it produces. The animals follow the rains and the fresh grass, completing an annual circuit that has no fixed start or end point. They are always moving somewhere.

The Migration follows a rough pattern that varies with rainfall year to year:

January to March is arguably the Migration's most underappreciated phase. The short grass plains of Ndutu in southern Tanzania fill with wildebeest giving birth at extraordinary speed — the whole calving season lasts just 2–3 weeks, and calves can stand within minutes and run within hours.

The calves attract every predator in the ecosystem: lion prides hunt in shifts, cheetah mothers are teaching cubs to hunt, hyena clans patrol at night, and jackal pairs dart in to take small prey. The density of predator action during calving rivals anything the Mara crossings offer.

Accommodation: Ndutu Safari Lodge and several seasonal camps operate in the area.

The Mara River crossings are the Migration's most dramatic — and most famous — spectacle. Thousands of wildebeest accumulate on the river bank, working themselves into a collective nervous state for hours before one animal takes the plunge and triggers a stampede.

The crossings are completely unpredictable. A crossing can happen at 7am or 3pm, last 20 minutes or three hours, involve 200 animals or 20,000. Nile crocodiles up to 5 metres long wait patiently. Drowning, crocodile attacks, and the sheer crush of panicking animals takes a toll that the herd absorbs and continues moving.

To witness a major crossing — the bank lined with wildebeest as far as you can see, the churning water, the crocodiles lunging — is one of wildlife's most viscerally powerful experiences.

The Migration spends most of the year in Tanzania (roughly 9 months) and 2–3 months in Kenya. The crossings happen at the Kenya-Tanzania border where the Mara River flows.

Tanzania — Serengeti: Better for calving season (Ndutu), the Grumeti River crossings (June), and if you want to stay in the Serengeti ecosystem year-round. The Serengeti is larger and more remote.

Kenya — Masai Mara: The place to be July–October for Mara River crossings. The Mara has excellent game viewing year-round (resident Big Five populations are dense), and the crossing spectacles are more accessible from camps along the river.

Where to stay for the best Migration experience:

Photographing the Migration requires specific preparation:

Key logistics: