How Do Roosters Know When to Crow?, Science

5 Common Myths About Roosters Dispelled - Hobby Farms

Common Rooster Myths - Clearing Up Rooster Misinformation, Page 4

Chicken - Wikipedia

When Do Roosters Start Crowing — Brimwood Farm

Why do roosters crow? - The Martha's Vineyard Times

Chicken Animal & Food Sciences

At what age does a rooster begin crowing? - My Pet Chicken

Social pecking order gives roosters something to crow about

Why Do Roosters Crow? Exploring the Science and History

The average rooster crow is about 130 dB, about the same volume as standing 15m from a jet taking off. To prevent deafness from their own calls, roosters have evolved soft tissue

Why Roosters Are Important (And Crowing Makes Them Great – Get Over It!) – Rose Hill Farm

Why do roosters crow in the early morning? - Quora

Why do roosters crow in the early morning? - Quora