..lay eggs on a regular basis, often daily, and without the aid of a rooster, whilst other species of bird only mate once a year and produce very few eggs. This has always puzzled me. Perhaps a bird keeper will explain.
Interesting, Mamya. I didn't know that about the beak colour. We were quite young at the time. I looked after Pippio when they went on holiday once. The bit I loved the most was in the evening, when I covered the cage with a cloth and she started to make a burbling noise as if she was talking to herself. It was so sweet!
divebuddy has covered most of the basics already. The domestic hen is a long way from the original jungle fowl and has been selectively bred for their laying propensity, just like the modern milking cow will produce milk well outside the usual lactating period.