Wildebeest and zebra crossing the Mara River.Masai Mara National Reserve. Kenya

- Image ID: BTDW4G
Martin Harvey / Alamy Stock Photo
Image ID: BTDW4G
Wildebeest and zebra crossing the Mara River. This is part of the annual migration. Although it is assumed that this migration is a frenzy and that the animals cross blindly, recent research has shown that a herd of wildebeest possesses what is known as a "swarm intelligence", whereby the animals explore and overcome the obstacle as one. Masai Mara National Reserve. Kenya