综合研究结果和讨论，雏鸽孵化时早期断奶会降低其体重、生长速度和饲料摄入量，同时增加死亡率。然而，对于亲鸽而言，早期断奶能显著缩短产卵和繁殖周期，增加产卵数量和成功断奶的雏鸽数量。虽然早期断奶对孵化率、蛋重、蛋长、蛋宽和蛋形指数无明显影响，但会使鸡蛋蛋壳厚度降低。

Several of the birds depicted were rock pigeons (Columba livia), along with a pied kingfisher (Ceryle rudis), a red-backed shrike (Lanius collurio), and a white wagtail (Motacilla alba).

Real-skeleton biology models are teaching aids. They reveal, among other things, how an animal moved, where it lived, if it got into fights, the shape of its teeth (if any) and what it ate – or if a ...