The World’s Largest Mammal Migration Isn’t in the Serengeti—and Only About 800 People See It Each Year

The World’s Largest Mammal Migration Isn’t in the Serengeti—and Only About 800 People See It Each Year

Every year, millions of fruit bats descend on a remote Zambian national park in one of nature’s most astonishing spectacles.Straw-coloured Fruit Bats -Eidolon helvum-, in flight at first light, Kasanka National Park, Zambia.Credit: Fabian von Poser/Getty ImagesThe largest mammal migration on earth has nothing to do with herds of wildebeest, zebras, and gazelles crossing the Serengeti; it happens in the air and at night, which is why only about 8…