Communiction

This is from the book Raising Chickens For Dummies.

1. Crowing: The loud "cock-a-doodle-do" a rooster makes is the chicken noise most people know best. Roosters crow whan they become sexually mature, and they don't just do it in the morning. The crow announces the rooster's presence to the world as ruler of his kingdome: It's a territorial signal. Different roosters have different crows - some are loud, some softer, some hoarse sounding, some shrill, and so on. Roosters crow all day long.
2. Crackling: Hens make a loud calling noise after they lay an egg. Many times other hens join in. It can go on for a few minutes. Some people call it a sighn of pride; others say it's a yell of relief!
3. Chucking or clucking: Both roosters and hens make a chuck-chuck or cluck-cluck sound as a conversational noises. It occures at anytime  and can be likened to people talking amongst themselves in a group. Who knows what they dicuss?
4. Perp-perping: Roosters make a soft perp, perp noise to call hens over to a good supply of food. Hens make a similar noise to alert their chicks to a food source.
5. Rebel yelling: Hey, its hard to describe these noises, but chickens give out a loud holler of alarm when they spot a hawk or other predators. All the other chickens scatter for cover.
6. Growling: All chickens can make a growling noise. Hens commonly make this noise when they are sittinf on eggs and someone disturbs them. It's a warning sound and may be followed by an attack or peck.
7. Squawking: Grab a chicken of eaither sex or scare on and you'll probably hear this loud sound. Sometimes other chickens run when they here the noise, and other times they're atteated, depending on the circumstances.
8. Other noises: The preceding sounds are only some of the morecommon chicken noises. Baby chicks peep, hens make a sort of crooning sound when they are nesting, and some hens seem to be humming when they're happy and contented. Roosters make aggressive fighting noises. Sit around a chicken coop long enough, and you'll hear the whole range of sounds.