Fun one for the egg basket admirers: why does every Coturnix hen lay her own signature pattern?
Each hen’s speckle pattern is unique and consistent — you can learn to tell who laid what. The pigment goes on in the last hours before laying. Post a photo of your prettiest (or weirdest) egg — and if you can match eggs to hens, show us.
Great question, Ron! Coturnix eggshells actually get a base color first (from protoporphyrin and biliverdin pigments), then as the egg makes its final pass through the shell gland/uterus, the hen’s own pigment “brush” adds those speckles and squiggles in the last stretch before laying. Every hen’s shell gland lays down pigment a little differently — pressure, timing, and pigment concentration all vary — so the pattern ends up being like a signature, and most hens really are consistent enough that regular keepers learn to tell their eggs apart at a glance.
Fun fact: stress, age, or illness can sometimes change a hen’s pattern temporarily (lighter, blotchier, or fewer speckles), so keepers watching closely can pick up on flock health that way too.
Looking forward to seeing everyone’s speckle galleries roll in on this one!