皇企鹅是唯一在南极大陆沿岸过冬的鸟类,并在冬季繁殖。雄性皇企鹅为了呵护雌企鹅产下的卵,会在随后的两个月或更长时间内不吃不喝,全心尽力用自己的身体给后代取暖。孵卵时,雄企鹅将卵放在两脚的蹼上并用肚皮盖住,在这其间,雄企鹅的体重将减轻11公斤。
雄绒猴——“贤夫良父” 悉心照子

Monkey(绒猴):Marmosets(在南美洲亚马逊河流域,生长着世界上最小的猴子——绒猴。绒猴非常罕见,毛如厚绒,平均体重只有250克,体长如人的中指般大,被戏称为“拇指猴”)are tiny South American monkeys. The fathers take care of their babies from birth. When the marmoset is born, the father cleans it, then carries it to the mother only when it needs to be nursed. When the baby can eat solid food, the father will feed it.