In August each year, 2.2 million wildebeest, along with hundreds of thousands of zebra and antelope, migrate from the Serengeti in Tanzania to the Maasai Mara in Kenya, in search of greener pastures. Along the way, they cross the Sand River and then the wide, crocodile infested Mara River. As the rains change, they do the same journey in reverse. These crossings are one of the greatest wildlife spectacles on Earth, as desperate animals fight for survival. After each crossing, there are a few less wildebeest.

This was something my whole family wanted to see while we were living in Kenya. But finding 2.2 million wildebeest in the Maasai Mara was harder than I thought. At 1,500 square kilometres, the Mara is vast, and the Serengeti is even larger. Finding the wildebeest at the exact moment that they decide to cross a river is almost impossible. But not quite.