https://www.metooo.it/u/6708aa3df2976711894e44a8
Brood parasitism has even been witnessed in greater roadrunners, where by their eggs ended up observed inside the nests of popular ravens and northern mockingbirds. The shells of the eggs of brood-parasitic cuckoos tend to be thicker and stronger than Those people of their hosts.[25] This shields the egg if a number mum or dad tries to wreck it, and will help it become resistant to cracking when dropped into a host nest.[26] Cuckoo eggshells have two distinctive levels. In a few nesting cuckoos, a thick, outer, chalky layer just isn't cu
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