White Ring on Brown Shell?

[sqatkins]

I forgot to add that the white ring is on one side of the egg only, on a long side, not circling the diameter of the egg. It's not raised. It is a defect in the color of the shell. It's as if pigment is missing, but it is the ring-shape that really has me puzzled?

I got one of these eggs just this morning, in Montana, with temperatures in the teens this morning, so it is not directly related to heat stress. I know this is an old post, but for future viewers, here is what I found:

19.) White Banded Eggs​

If two eggs come into contact with each other in the shell gland pouch, normal calcification is interrupted. The first egg retained in the pouch will have an extra layer of calcium seen as the white band marking.

Causes:

• Stress
• Changes in lighting
  
  

 

[sqatkins]

I forgot to add that the white ring is on one side of the egg only, on a long side, not circling the diameter of the egg. It's not raised. It is a defect in the color of the shell. It's as if pigment is missing, but it is the ring-shape that really has me puzzled?

I had the same thing on an egg I collected this morning, and it was 19 degrees here this morning in Montana, so I don't think it is associated with heat stress in particular, but maybe stress in general. I know this is an old post, but here is what I found through research for others looking for answers:

19.) White Banded Eggs​

If two eggs come into contact with each other in the shell gland pouch, normal calcification is interrupted. The first egg retained in the pouch will have an extra layer of calcium seen as the white band marking.

Causes:

• Stress
• Changes in lighting