The lava completely buries the pre-existent land forms over most of its extent.
A diggingwasp hunts for insect prey and buries it with the egg, while a true wasp feeds her brood with captured insects, as a bird her fledglings.
It buries itself alive.
The living animal buries itself in the sand with only the posterior extremity projecting into the Siphonopodiidae.
Among the more interesting birds may be mentioned the " mound builder " (Megapodius cumingi, Dillwyn), which buries its large eggs in the soft sand along the sea beach, or under great mounds of earth and dead leaves, often at a depth of three or more feet below the surface.
The reproduction of tsetse-flies is highly remarkable; instead of laying eggs or being ovovivi parous the females deposit at intervals of about a fortnight or three weeks a single full-grown larva, which forthwith buries itself in the ground to a depth of several centi metres, and assumes the pupal state.