Most people know that fish hang out in schools and sheep gather in flocks.
The English language has more than 1,000 names for groups of things. The names for groups of fish and wildlife date back to the Middle Ages, when knights and lords on horseback chased all kinds of animals. Many of the words used to describe groups of animals were hunting terms. Hunters might pursue a dray of squirrels, a fall of woodcock, or a spring of teal. Herd is one term people still use to describe a group deer, cattle, or elephants.