The history of chickens has been cut back to Archaeopteryx. Archaeopteryx fossils are found in the Jurassic strata of Bavaria, Germany<br>There are clear feather marks on it. The beak is long and there are teeth. The forelimb has developed into a weak wing. The wing has three long toes. Each toe has one claw and one seems to climb<br>The long tail of an insect with drooping feathers on both sides. Chicken is the most common poultry, according to historical records and evidence of zoogeography, Asia<br>The southeast of the continent is the birthplace of domestic chickens. There are four kinds of wild chickens in this area, namely red jungle chicken, Ceylon jungle chicken and grey jungle chicken<br>Chicken, black or green jungle chicken. The origin of the theory is divided into single source theory and multi-source theory<br>One ancestor, the multi-source theory, thinks that the domestic chicken is any two or more descendants of the existing jungle chicken.<br>
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