Australorps are big and beautiful. The roosters are very impressive. I know them from many chicken expositions I have visited.I used to have a whole flock of Black Australorps. - great, quiet, friendly and good layers of big brown eggs.
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The Australorp is a chicken breed of Australian origin, developed as utility breed with a focus on egg laying. It achieved world-wide popularity in the 1920s after the breed broke numerous world records for number of eggs laid and has been a popular breed in the western world since.
Do you know the Marans chicken ? They lay very dark, red brown eggs.