Why Do Roosters Crow?
Roosters crow in order to attract hens (female chickens), and to tell other roosters: “This is my territory, stay out!” Sometimes roosters seem to crow just for the joy of it. Every morning, right around the time the sun comes up, and it starts to get lighter outside, roosters begin to crow. All that crowing isn’t really meant to tell anyone the time.
As a diurnal animal (one that is active during the day), the rooster starts his daily doings when the sun comes up. If you think about early morning, it’s almost always associated with bird song. Most birds seem to spend time shouting their messages to the world in the morning, and chickens are no different.
Once roosters are awake, they keep crowing all day. Other birds wake up at dawn, and sing for the same reasons a rooster crows. It just seems that roosters are much noisier when they wake up! Roosters may also crow as a reaction to something changing in their environment, such as the sound of a car or a person approaching.