Different theories exist:
- Camouflage? Speckled eggs are laid by birds that roam freely in natural environment. The speckles help to hide the eggs from predators.
- Pigment deficiency? Some specialists claim speckled egg rotate too slowly during the 'coloring' stage. Did you know, all egg shells are 'manufactured' white inside the chicken first?
- A National Geographic study from 2005 found that the dark spots were specifically located on the parts of the shell that were the thinnest. The chemicals in the pigment then act a bit like glue. The speckles support the weak areas of the shell and protect it from breaking.
Speckles make eggs beautiful and unique. What other theories can you find?