Do female finches lay eggs even without breeding with males and If this is normal then what do you the when they are laid?

Yes, female finches can lay eggs even without breeding with males. This is known as "parthenogenesis" and is a natural phenomenon observed in some bird species, including certain finches. When this occurs, the eggs produced by the female are not fertilized and will not develop into viable offspring.

In such cases, the unfertilized eggs laid by female finches are usually smaller in size compared to fertilized eggs and may not have a hard eggshell. The female finch will typically lay these eggs in her nest, just as she would with fertilized eggs, and may even attempt to incubate them. However, since the eggs are not fertilized, they will not hatch, and the female will eventually abandon the nest.

Parthenogenesis in finches is relatively rare and is not a common reproductive strategy. It is more commonly observed in other bird species, such as turkeys and chickens. In these species, parthenogenesis can be induced artificially through specific breeding techniques or environmental factors.

The reasons for parthenogenesis in finches and other birds are not fully understood, but it is believed to be related to genetic factors and the absence of suitable mates. It is thought that parthenogenesis can provide a reproductive advantage to females in certain situations, such as when there is a lack of males or when the female is isolated from potential mates.

Overall, while parthenogenesis does occur in some finch species, it is not a common reproductive strategy and the unfertilized eggs laid by female finches will not develop into viable offspring.