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.
Yes, cockatiel eggs can be fertile. To determine if they are viable for hatching, you can candle the eggs by shining a light through them to see if there is a developing embryo inside. This can usually be done after about a week of incubation.
After 3-10 days of the bird sitting on the egg, take the egg to a strong light and if it has redish vines in it, then it is fertile. If it's just white then its not.
86% of the time a cockatiel's eggs aren't fertile. The cockatiel lays them if it is in love with you. If it lays them you have a problem, and it's called being egg bound. If an egg gets stuck, then your beloved bird will die.
You have a birds and an egg instead of just a bird. If you mean, will it be fertile, the record for longevity of sperm in birds is 6 weeks in a canary.
they are protecting their egg.
You could take to a lab or a vet they have these special machines that can tell if its fertile or not
You can't tell if it's fertile or not based on its weight. The same amount of stuff goes into the egg regardless if it's been fertilized or not.
pick up the egg
To determine if your cockatiel has laid fertile eggs, you can either candle the eggs after a few days of incubation to see if there are developing embryos inside, or consult a veterinarian for a professional evaluation.
You cannot. A female cockatiel needs a male cockatiel to mate with her before she will produce fertile eggs. And incidentally, birds do not "fall pregnant".
Well, it depends on if the cockatiel is willing to raise the egg that is obviously not it's egg. If it is, then the bluebird chick will learn how to live life as a cockatiel. The bluebird will never have a crest, but it will learn the cockatiel's language as it's own and think it is a cockatiel because that is the type of bird it is living with. However, if you had a wild cockatiel and you set a bluebird egg in with the other eggs, the cockatiel would reject the eggs because they do not look right or smell right, and would drop the egg out of the nest. I hope that answered your question. :) - Emily Sage
you really cant.. DONT TOUCH THEM. just leave them alone. the mother hen knows if there fertile or not. if there not fertile she'll push them to the side, if they are fertile she will sit on them. but sometimes a pushed aside egg is fertile and also it is always warm as the person said above DON'T TOUCH THEM!!