Chickens' pelvises are tipped backward, like dinosaurs were supposed to have been.
My Copper Marans rooster, Russell Crowe (with apologies to Himself), makes this horrid grawking noise I cannot describe, which has earned him the nickname Raptor Russell. He crows - good grief does he crow.
Chickens get all excited anytime anything living comes around. Mine stretch their necks and fuss for foxes (good for them), and deer, and even the wee bunny that is outside the fence and 20 yards up the hill. Guess they need something to talk about.
Chickens make sweet little chirring noises when asleep on the roost at night, content and unafraid. Kind-of like a high-freq purr.
I could use to hear someone weigh in if they've ever clocked one running. They book! Watching them run is the funniest thing on my site right now (and I can always use funny).
Someone once described them as the gateway drug to goats and other animals. I believe it.
I have a Brahma that, by the end of the day, has a small baseball for a crop. Girl can EAT.
The things I didn't know when I opened the box containing my new grown hens, and four utterly alien life forms looked me in the eye, I mean the things I couldn't find in a book ANYwhere, were substantial.