Many Old World cuckoo species are brood parasites.

A month later, the successful foragers continued in their role while the others had moved to specialise in brood care.

The male guards the nest until the brood hatches, which, depending on water temperature, can take from three to ten days.

Flies in the Old World genus Bengalia (Calliphoridae) prey on ants and are kleptoparasites, snatching prey or brood from the mandibles of adult ants.

Each female thus produces many thousands of triungulin larvae that emerge from the brood opening on the head, which protrudes outside the host body.

Larvae and pupae need to be kept at fairly constant temperatures to ensure proper development, and so often, are moved around among the various brood chambers within the colony.

In the Stylopidia, the female's anterior region protrudes out of the host body and the male mates by rupturing the female's brood canal opening, which lies between the head andprothorax.

Jerusalem, Jerusalem, that kills the prophets, and stones those who are sent to her! How often I wanted to gather your children together, like a hen gathers her own brood under her wings, and you refused!

O Jerusalem, Jerusalem, which killest the prophets, and stonest them that are sent unto thee how often would I have gathered thy children together, as a hen doth gather her brood under her wings, and ye would not!

But what happens when they get children? What do the children do? In liberal families, it isn't a big deal and freedom of choice and common sense reigns, as the young brood is exposed to the cultures and traditions of both faiths.