BritPilot777 From United Kingdom, joined Apr 2004, 1075 posts, RR: 2 Posted (9 years 9 months 6 days ago) and read 956 times:
So last night in bed (yea dont ask cos I dunno) I was thinking, why the hell are egg's different colours? Here in the UK they are the orange colour whites across the pond they are white. Are they any other colours around the world?!
ArmitageShanks From UK - England, joined Dec 2003, 3648 posts, RR: 15
Reply 1, posted (9 years 9 months 5 days 22 hours ago) and read 931 times:
The answer has a lot to do with where the eggs are laid. If the eggs are in a nest of leaves and twigs, speckled green and brown eggs will be difficult for egg-eating predators to find. On a rocky ledge, gray and black spots will help to hide the egg. White eggs are easier for predators to spot, so birds that have white eggs usually lay them out of sight, inside tree hollows or in burrows. In places where many birds are nesting near each other, such as rocky sea cliffs, different markings may help the parents recognize their own nests.
The breeds that lay white-shelled eggs are more prolific and eat less feed, so they were the more profitable choice for factory farming here in the U.S.
Redngold From United States of America, joined Mar 2000, 6907 posts, RR: 44
Reply 3, posted (9 years 9 months 5 days 21 hours ago) and read 915 times:
NoUFO -- I hope you're not serious...
I can't explain the shell colour off the top of my head, but the internal colour is determined by the color of the major constitutent.
The "egg white" has a high protein content, much of which is a chemical called albumin. Albumin is mostly clear at room temperature but when subjected to heat (cooking) the protein coagulates (denatures) and turns white.
At the same time, the yolk has a high sulfur and iron content. The yellowish orange color of an uncooked yolk is due to the sulfur content as viewed through the uncoagulated albumen.
A boiled egg has a solid yellow yolk again due to the sulfur.
A solid yolk, if subjected to continued heat, will get a green surface as the iron in the egg white interacts with the sulfur on the surface of the yolk. If you have a greenish yolk and you cut it, you will see that the centre is still yellow.
AsstChiefMark From , joined Dec 1969, posts, RR:
Reply 5, posted (9 years 9 months 5 days 17 hours ago) and read 888 times:
The color of an eggshell depends upon the breed of hen. Hens with white ear lobes lay white eggs. Hens with red ear lobes lay brown eggs. Rhode Island Reds, New Hampshires and Plymouth Rock chickens lay brown eggs. White Leghorns and Brown Leghorns lay white eggs.
N506CR From Costa Rica, joined Nov 2004, 147 posts, RR: 2
Reply 6, posted (9 years 9 months 5 days 16 hours ago) and read 883 times:
no kidding my granduncle (kinda my grandmom) has a blue (all light blue) egg lying chicken. I show them to some people and they think I'm lying. NO I'm not! I don't paint eggs. Whenever I go to her house again I'll get a shot of them.
CaptOveur From , joined Dec 1969, posts, RR:
Reply 10, posted (9 years 9 months 4 days 15 hours ago) and read 837 times:
I thought the shell color was related to diet.. My girlfriend has an aunt with a farm so we get a fairly steady supply of good eggs (not those lousy grocery store things) and they come in all different shades of brown and white. I have never met the chickens though.
I know someone who had white ducks, they laid white eggs. Duck eggs are the best if you can get them, very creamy and considerably larger than chicken eggs.