;altricial birds.
雏的鸟
雏的altricial birds.
雏的鸟
The chickens were altricial and the parental care period lasted for 40~50 days, including three stages.
雏鸟
鸟，育雏期40~50天左右，育雏过程分育雏初期、中期、末期三阶段；
声明：以上
句、词性分
均由互联网资源自动生，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
