Weird egg…never seen anything like it…ideas

[mldlm]

I went out to the coop this morning and found this egg on the floor under my black australorp who was up on the roost. (My Speckled Sussex actually found it before me…hence the little hole…lol). Anyhow, I put a quarter next to it for size comparison. She has been laying since October. Any ideas? Thanks and Happy Easter!

 

[aart]

Probably just a glitch.
Called a fairy egg.

Fairy, fart, wind, rooster eggs are usually from a tiny piece of tissue breaking loose from the reproductive tract, or an immature ova(yolk) and the body forms an egg around it. Color can be darker than 'normal' as the pigment coating released has to cover a much smaller area so is thicker. Can happen with any age layer, but more common with older layers.