Besides, breeding, brood stage is very like sparrows gregarious birds.
除繁殖、育雏阶段外，麻雀是非常喜欢群居的鸟类。
Breeding density: brood stage is refers to the unit in the area of feeding bird-flu brood only number.
饲养密度：在育雏阶段是指单位育雏面积上饲养的雏鸡只数。
Breeding density: brood stage is refers to the unit in the area of feeding bird-flu brood only number.
饲养密度：在育雏阶段是指单位育雏面积上饲养的雏鸡只数。
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