When the mother hears chirping sounds, she removes the nest covering, sometimes breaking the eggs if the hatchlings have not already done so with their specially provided shell - breaking tooth.
Kui krokodilliema kuuleb pesast krooksuvaid häälitsusi, kraabib ta munadelt pesamaterjali ja purustab vahel isegi munakoore, kui pisikesed seda ise pole teinud.