Indeed, although there is a contradiction in society. In theory a female, like cats and dogs, should have multiple males try to impregnate her so the strongest sperm survive and ALL those males then take care of her and the baby. In reality males are not as likely to nurture a child they do not know is definitely their own. Excuse the generalisation there. I agree about the birds. I used to love seeing the few adult nursemaid Canada Geese caring for a large flock of all the chicks when I lived near their grounds.