It’s what zebra do when they are at water, the slightest disturbance and they all perform a mass retreat from the waters edge, it’s entertaining to watch, if one twitches even in the slightest they all just run for it.
This is one of the less visited places in Botswana the Makgadikgadi Pans national park. There is always wildlife on the western edge of the park near the boteti river. In the center of the park there are huge herds of zebra that form part of a migration, we visited in April and they were around. This photo was taken on the boteti river.