This rare event is probably a case of reversion to the longlost, aboriginal instinct of nidification . 这稀有的事实，也许是它们久已失去的造巢育雏的本能之重现。
2.
Chicks reared under natural light are frequently debeaked at 1 day of age or a few days after delivery to the brooder . 在天然光线下饲养的小鸡，经常是在一日龄时或在进入育雏室后几天内断喙。
3.
Avoid wildlife during sensitive times : mating , nesting , raising young , or winter 避开敏感时节：交配期、筑巢、育雏，或冬季。
4.
Only after the mother comes to take charge8 ) , can the father penguin go to eat and rest 只有当帝企鹅妈妈接手育雏工作之后，帝企鹅爸爸才能去进食休息。
5.
Control pets at all times , or leave them at home . - avoid wildlife during sensitive times : mating , nesting , raising young , or winter 管束宠物，否则留它们在家。 -避开敏感时节：交配期、筑巢、育雏，或冬季。
6.
The researchers reckon that the penduline tit is the only known bird species in which both males and females use the same strategy to produce more chicks 研究者认为攀雀是目前已知雄性和雌性都使用相同的策略提高育雏率的唯一鸟种。
7.
Between 50 % and 70 % of the time , it is the female who nurtures and provides for the brood but the male assumes this role in between 5 % and 20 % of nests 通常50 %至70 %是由雌雀承担孵蛋和哺育幼雏的责任，而,它是女性孕育者,并为育雏,而以雄雀担当这个角色则占巢数的50 % - 70 % 。
8.
This book tells you how plumage , shape of the beak , and features of feet and claws differ from species to species , and introduces breeding behaviors like how birds build nest , hatch eggs and rear their kids 本书介绍鸟类的羽毛嘴喙脚爪等不同功能的形态特徵筑巢孵蛋育雏等繁殖行为。
9.
This book tells you how plumage , shape of the beak , and features of feet and claws differ from species to species , and introduces breeding behaviors like how birds build nest , hatch eggs and rear their kids 本书介绍鸟类的羽毛、嘴喙、脚爪等不同功能的形态特徵；筑巢、孵蛋、育雏等繁殖行为。
