An egg (whether fertile or not) will not float in water (in the shell of course) if it hasn't gone bad. If you don't want to eat fertile eggs then crack them into a separate bowl first and if there is a red dot in the yoke then it is fertile. you can just throw that one away and you won't have to worry about wasting eggs because one of the eggs in the whole batch was bad.
A fertile chicken egg contains an embryo, which is what grows to become a baby chicken, gradually consuming the egg yolk and the egg white in the process.
An egg can float in water if it is not fresh because as the egg ages, it loses moisture and air enters the shell, increasing its buoyancy. This causes the egg to float due to the air pocket inside it.
The substances inside of the egg, yolk, embryo and surrounding fluid, as well as the surface area of the egg allow for the egg to float. This is the same principle that allows you to float in the ocean, namely that increase of surface area equals a decreased mass per square inch.
Air pockets in an egg help to provide cushioning for the developing embryo and allow for movement within the egg. They also help the egg to float in water, making it easier to determine freshness.
After day 5 of incubation you can candle the egg to see shadowy changes within the egg. There are no outward indicators of fertility with chicken eggs. Candling eggs means to shine a bright light into the end of the egg and observe the development of the embryo within. A non fertile egg will show no shadows within the shell.
the developing embryo is nourished by yolk
Embryo is formed in germinal spot of yolk .
There is a embryo in the egg.
fertilized egg,embryo, and fetus
Yes, fertilized bird eggs can float due to air pockets forming inside as the embryo develops. This can happen as the egg ages, allowing it to become more buoyant in water.
As I'm not an expert but have had many parakeets. If the hen or female broke the shell that is fertile she may be helping the chick to break free. If she did this to an egg that is not fertile, she may have sensed this & wanted to eat the shell & contents. Both are very nutritious providing the hen with much needed calcium. In the wild they may do this to keep predators from going after an egg that's not fertile or even an embryo born dead.
When its just fresh there's no telling. After the hen has been sitting on it or has been in an incubator you can tell be holding it against a bright light (you can see blood veins in the egg) or put it in water; a fertilized egg will float, and a non fertilized egg will sick. A spoiled/ rotten egg will float as well, but it will be quiet old when that happens.