The rooster’s crow is an iconic rural sound, a natural alarm clock that has been waking farmers long before the invention of modern alarms. In many urban and suburban areas today, roosters are often banned because of their loud crowing. Primarily, roosters serve two purposes: breeding and safeguarding their flock. They take the latter role seriously, patrolling the edges of their territory to keep their hens safe. A rooster crows for several reasons: to signal safety, establish his authority, and alert his flock to potential threats.

Source: Harvest-Savvy