the yolk
Just about all birds can see colors such as yellow.
Yes, of course! They are very much birds, and birds lay eggs. Do a wikipedia search, and you will see. :)
yes you do XD
Female birds to not get pregnant. They lay fertilized eggs if they have spent enough time with a male bird. If you don't want baby birds, take away the eggs. If you want baby birds, let the female incubate them by keeping them warm.
You can try candling quail eggs at about eight days. Though it is often hard to see due to the coloration of the shell.
You can candle them to check for development. Mark those with dark spots indicating they are viable and date them. If after 21 days there is no change they are garbage. If you candle and see nothing, then they were not fertile eggs and should be discarded.
Oology is the branch of zoology that deals with the study of eggs. Well, kind of, it is the branch of ornithology, that deals with birds and eggs. Ornithology is the scientific study, of birds as a branch, of zoology. I try to see it as a big topic that gets narrower and narrower.
When they do that they're not fertile or have gone bad ie they're no longer alive in there. Just remove them if you see them out. Also it's a possibility that she's on too many eggs. Sometimes other hens will lay their eggs near the sitting hen then push them under her! Nice huh? I always candle my eggs first before I throw them away. Don't leave them there or the birds MIGHT eat them.
If they are round and plump. Infertile eggs also tend to be yellow. Even if the eggs are dented I would still put them in an incubator until they mold since they can still be fertile and produce perfectly healthy babies.
The best way to tell if eggs are gluggers is to candle them. Hold a flashlight behind them in a dark room. You should be able to see the veins or developing embryo if they are fertile.
Idaho has a number of chicken farms which sell eggs for food. However many other birds, amphibians, and fish lay eggs to reproduce.
that's just there egg colour like you see lots of animals eggs and they are diffrent colours so ya.....