The Gnu & Its Wanderlust – The Great Wildebeest Migration In The Serengeti

We very nearly missed the river crossings we had come to the Serengeti to witness.

Rains arrived early this year. And the wildebeest herds, following some primal genetic coding that propels them on an arduous trek across the Savannah in search of fresh new grass, had already moved to the Northern plains. Perhaps even crossed over to the Masai Mara. The worry was that they would be well on their return journey into Southern Serengeti by the time we reached the North.

Some people mistakenly assume – or are led to believe – that the cross border migration of wildebeest is a seasonal occurence exclusive to the Masai Mara in Kenya between July to September. In actual fact the great migration is a year round phenomenon in which over two million herbivores – around one and a half million wildebeest along with zebra and gazelle numbering nearly six hundred thousand – follow the rain collectively in an 1800 mile long clockwise loop. And the bulk of this ‘greatest mammalian movement on earth’ takes place in the Serengeti in Tanzania.

It is therefore technically possible to catch the migrating herds at any time of the year at a corresponding location. Roughly based on their movements in preceding years: Jan – Feb in the Southern plains for synchronised calving, Mar – May heading North along the Western corridor, June to early July along the Grumeti river, July – August around the Mara river and plains, Aug to Oct in Kogatende in the North as well as across the border in Masai Mara. Then back again to the South along Seronera in Central Serengeti to repeat the sequence all over again. A cycle they have been repeating for God knows how long!

One million year old fossil finds prove their seasonal presence in the Olduvai Gorge (where the Leakey’s researched the origin of man). Scientific mapping of herds only began in the late fifties, thanks to the efforts of Bernhard Grzimek (whose book; “the Serengeti shall not die”, was instrumental in the creation of the Serengeti National Park) and his young son Michael Grzimek. The latter died in a plane crash during the process and is buried in Ngorongoro.

An accurate pattern of movement is naturally impossible to predict, and is hugely dependent on the rain Gods playing by the rules.When they don’t, well, you keep your fingers crossed and hope for the best.

We did just that. And managed to catch one tail end crossing across the Kogatende river on our first day in the North, and three in a row on the second!

If we had only arrived a couple of weeks earlier we would have witnessed giant herds crossing incessantly for hours. We were told we could have gone back to our lodge for lunch and returned to find them still crossing! That would have been some spectacle! But as it was, what we did get to see was pretty special.

Wildebeest river crossing - Serengeti National Park

Wildebeest river crossing - Serengeti National Park

Wildebeest river crossing - Serengeti National Park

Wildebeest river crossing - Serengeti National Park

Wildebeest river crossing - Serengeti National Park

Wildebeest river crossing - Serengeti National Park

Wildebeest river crossing - Serengeti National Park
Bravo! All across without incident, and none ended up as croc fodder!

Our most dramatic encounter however –  a National Geographic experience, George (our guide/driver) called it – was a wildebeest road crossing earlier in the safari in Central Serengeti.Rain in the distance and a few stalking lions behind, triggered the massing (herding) of a large splinter group that George figured was headed in our direction. So we retreated further back allowing them space. Not all drivers were as sensitive however, and we were dumbfounded by a couple of vehicles that drove right into the midst of the agitated group.

I have carefully edited out my choice exclamations at this grossly insensitive behaviour and hubby's concerned clucking from the video below :-)

After several false starts it took one plucky gnu to set hundreds of hooves thundering straight past us in a humongous cloud of dust, and galloping off into the promisingly dark horizon. It was George’s foresight and sensitivity that afforded us this ringside view of one of the most exciting spectacles we have ever witnessed. Thank you George!

As the last of the wildebeest rushed across, George turned around and let out a cry.

Peering through the haze right behind us, with a comical “What just happened?” expression on his face was this bewildered lion…part of the same pride that was foiled by another ungulate herd the day before.

Lion - Serengeti

An aside for the word lovers and etymology nerds amongst you: It is assumed (among other interpretations) that the call of the wildebeest (‘wild cattle’ in Dutch for lack of a better name for this strange animal at the time.) is the source of the name Gnu. But were you aware that the collective noun is “an implausibility of Gnus“?



As mentioned above, the migration is a year round affair and large herds will be on the move year round in the elliptical loop. The highlights that you might want to witness are the following:

Synchronised Calving: Jan – Feb in the Southern plains. I hope to witness this someday…Godwilling.

Grumeti River Crossings: May to early July.

Mara Plains & River Crossings: August – early October. This is a wide stretch moving from the lower Mara plains up to Kogatende in the North as well as across the border in Masai Mara, Kenya before they head south into central Serengeti again.

It is good to remember that these are wild creatures and will most likely not stick to a convenient schedule. They’ve been known to reach the river and not cross for days. Or cross numerous times without break in a single day. So much will depend on weather patterns and even more on luck.

More from Africa:
The Captivating Landscape Of Tarangire
Elephant Crossing
Rubbing Shoulders With Siverbacks

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Madhu is an Interior designer turned travel blogger on a long sabbatical to explore the world. When not crafting stories on The Urge To Wander, she's probably Tweeting @theurgetowander or sharing special moments on

138 thoughts on “The Gnu & Its Wanderlust – The Great Wildebeest Migration In The Serengeti

    1. Africa gets under your skin doesn’t it? We are already dreaming of a return 🙂 Thank you for reading Alison.

  1. These are all NatGeo caliber shots, Madhu! But, I must admit, the bewildered lion is my favorite. What an unbelievably amazing experience and your wording puts such a mystical spin to it all. Happy New Year, wishing you all the best.

    1. Mine as well! We all laughed out loud at that look on his face 🙂 Thank you Tahira. All best wishes for the new year to you too.

  2. Hi Madhu. No new posts this year? Everything OK?
    (No pressure!)
    Be good

    1. Brian, I got bogged down with some personal issues and kind of lost my muse. All well now. Appreciate the concern 🙂

      1. Glad to hear that Madhu! 🙂
        (We all get “bogged” down by what eventually, as we look back are mere trifles! I am right now! But we will succeed!)
        Take care

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