What are the characteristics of burying a bird's nest?

When some European immigrants moved to the Australian coast to settle down, they found many piles of big leaves there. At first, these immigrants thought it was a fortress piled up by local aboriginal children when they played games. Some people think it's a grave after the death of aborigines? 1840, biologist John first opened a bunch of big leaves. He was surprised to find that what was buried in the "grave" was actually a bird's egg. Later, people called this bird with big leaves a burial bird?

Every year, in the breeding season, the busy figure of male burial birds appears in the jungle? They kept digging on the ground with their big claws, and finally dug a pit about 1 m deep and 4 or 5 meters in diameter? Then, they collect many dried leaves around? Hay, etc , piled up in the pit? Success will not be achieved until the ground is above 1 m and the pile diameter reaches 3-4 m? The leaves are piled up, just waiting for rain? After the leaves were soaked by rain, the buried birds began to pile sand again? The sand layer can be as thick as 0.5 meters? It turns out that buried birds don't hatch their young with their own body temperature like other birds, but rely on the heat generated by the decay and fermentation of leaves in the leaf pile to hatch their eggs? Some buried birds can even use the heat of sunlight or volcanic activity to hatch their eggs?

After the "great project" of burying birds was initially completed, the leaves began to rot. When the heat generated by fermentation made the temperature in the pile reach 33.3℃, it built an egg room on the top of the pile? The female bird climbed to the top of the big leaf pile and laid an egg in the egg room? After laying eggs, the females leave immediately, and the males put the eggs back? In this way, every 2-3 days, the female lays an egg, which can lay about 30-40 eggs?

As the leaves ferment, the heat accumulates more and more, and the temperature of the egg room rises? If the temperature is too high, campers will quickly pull away the sand to give off heat? When the temperature in the egg room became low, the buried birds quickly piled sand on the leaves? In this way, the burial birds tore up the sand again and again, piled it up again and again, and were busy day and night, keeping the temperature of the egg room at the top of the pile at 33.3 degrees Celsius? It is speculated that the neck skin of buried birds is a very sensitive thermal detector?

After seven weeks of incubation, the buried birds began to hatch? These chicks not only pecked through the eggshell, but also dug holes from the egg room. A few hours after birth, they can see the strange world outside the egg house. According to the observation records, it takes four months to accumulate a big leaf pile, adjust the room temperature and be responsible for hatching. How many months does it take? So it can be said that the camp burial bird is probably busy around the leaves all his life, right?