Some animal eggs will hatch by the heat generated when microorganisms in the soil and compost decompose organic matter, but these microorganisms (including bacteria) will also penetrate the eggshell and infect embryos. Naturally, this ratio is higher than 20%. However, in In Australia, there is a bird named Congzhong pheasant , whose eggs are only 9% infected. Researchers have found that their eggshells contain lysozyme. Based on this, the researchers believe that the key factor is that this substance is likely to resist Bacteria infestation.
The amount of lysozyme contained in the eggshell of the Congzhong pheasant is roughly the same as that of other animals is true and does not weaken the above conclusion.