Bison can be grouped under several collective nouns, the most familiar being a herd or a gang, while less common choices include an obstinacy and a troop. The word herd traces back to the Old English “hierde”, meaning a flock of animals, and gang comes from the Old Norse “gangr”. Both names fit bison well, since these animals tend to move and feed together in large numbers. The name obstinacy plays on their reputation for being stubborn when gathered as a group.
What Is a Group of Bison Called? – Bison Collective Nouns
