Square Odds #10


Becky’s The square Odds challenge

Oddly coloured eggs

Chicken egg colours explained:

  • White eggs: all eggshells are made of calcium carbonate and the white ones have no pigment added
  • Brown eggs: caused by protoporphyrin IX, from the hen’s haemoglobin, and is coated on the outside of the egg as it moves through the oviduct
  • Blue eggs: have the pigment oocyanin, which does permeate the shell, so the blue colouring will be all the way through
  • Green eggs: if a brown layer and a blue layer are crossbred, chances are you will get a green egg when the protoporphyrin IX layer is deposited over the blue oocyanin shell
  • Pink eggs: comes from the bloom or cuticle, a natural coating that seals the eggshell’s pores. The bloom is often washed off before eggs are sold commercially
  • Speckled eggs: can be laid by any hen with pigmented shells and comes from the egg…

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Published by derrickjknight

I am an octogenarian enjoying rambling physically and photographing what I see, and rambling in my head as memories are triggered. I also ramble through a lifetime's photographs. In these later years much rambling is done in a car.

37 thoughts on “Square Odds #10

  1. Gosh! Thanks for the information. Although I’m used to having chickens around, both my grandmother and mother liked to have a backyard coop of chickens. The chickens were all white leghorns and laid white eggs. The only other color of eggs I’ve seen are brown ones. And that was from a solitary Red Rhode mum had. Of course later, when we moved to the city and she couldn’t have a brood of chickens, we had to buy ours and there were brown shelled eggs in the market too.

  2. Thank you for sharing this, Derrick! It’s such interesting info! The various colours of eggshells always intrigued me. 🙂 We have a friend who shares their chicken’s brownish eggs with us. 🙂
    (((HUGS))) 🙂

  3. Well, you sent me down the Google rabbit hole, and I was charmed to find this about robin eggs:

    “The blue colour in robin eggs is due to biliverdin, a pigment deposited on the eggshell when the female lays the eggs. There is some evidence that higher biliverdin levels indicate a healthier female and brighter blue eggs. Eggs laid by a healthier female seemed to encourage males to take more interest in their young.”

  4. The duck eggs I’ve seen down by our ponds and sometimes purchased from a nearby farm have always been more of a blue colour than the usual commercial blue green paint colour named duck egg blue, which I believe is the colour of your kitchen cupboards and also mine.
    Anyway, I’ve often wondered if ducks of different breeds also produce different coloured eggs.

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