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The duck laid one egg and then left in the nest.
A fertile, viable duck egg typically hatches 28 days after incubation is begun.
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.
No. If the female attempted to hatch eggs without a male, the eggs won't be fertile, and the egg will just go rotten.
I guess you would candle it just like any other egg. You put the egg on a focused beam of light in a dark room and if the light won't go through and the egg doesn't light up, it's fertile.
No. You can not hatch an old duck egg. It must be continually kept warm and turned over from the time it is laid until it hatches. Once the duckling inside dies, it can not be revived.
Eggs laid on land are hatched on the land and eggs laid in the water hatch in the water. *o*
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!!
As with chicken eggs, fertilization occurs prior to laying the egg. It takes a week after mating for a duck's eggs to be fertile.
The Egg - another species that the duck has evolved from lays the duck egg, and the duck is born :)
About 21 days