Zebra's face ripped off by crocodiles crossing Mara river while Migrating through Kenya

I was recently on a Safari at Masai Mara National Park in Kenya this year for the Great Wildebeest Migration. Every year during the season of the Great Migration the zebras must take the risk of crossing many rivers in order to get to the grass that they badly need in order to survive. If the zebras do not get to their source of food they may perish. Sometimes, after crossing a river full of hungry crocodiles, the zebras do not find good grass on the other side. Then they will turn around and go back through the same river to face the vicious crocodiles all over again.