Why are my parakeets throwing their eggs out of the nesting box?

If you are hoping to raise babies, then providing nesting material for the parents is best so that they can make a safe nest where the eggs are less likely to fall or break. The parents may also break eggs or discard them if they aren't viable or they are young parents that don't know what to do. Because the eggs need to be incubated, they need to remain in the nest with the parents in order to hatch. You can keep letting both parents try to raise a clutch (and be sure to provide a calcium supplement for the mother), or, if you don't wish to raise babies, can just remove and discard any laid eggs.

If a "matki" is her nest, try a nesting box with a lip or edge that will prevent her from rolling or tossing eggs out. These may be infertile eggs that she is removing. As I understand, matki can also be a food dish. In this case, she may have a preference for the matki over cooked eggs. Omit the eggs from the recipe for a few days then slowly reintroduce them to see if she will eat them.

Thanks for reaching out about Nanu. Was the egg broken in the nest or did she lay it from a perch and fell? Sometimes birds know the egg is not fertile and will break it. Stress might also cause behavioral changes where they break/eat the egg. Maintain a good diet as laying lots of eggs is a huge calcium loss and they need to replenish. Good luck.

I've attached some articles about budgies and egg laying. If mom is tossing eggs out of the nest something in the environment is not conducive to her sitting on them. Make sure the cage is big enough and that they have an adequate nest box. Make sure they are on a high quality food- seeds are not sufficient for an egg laying bird. She needs pelleted diet, fresh foods and calcium supplementation. It's recommended not to let her have more than 1-2 clutches a year to prevent health issue for Boo Boo. http://budgieplace.com/breeding.html https://lafeber.com/pet-birds/egg-laying-affects-pet-bird/

If the aviary is too small to handle multiple breeding pairs it may be that they are competing for nesting space, even if there are multiple nests. One nest may be seen as "ideal" and thus everyone is fighting over it. Usually, birds are separated into individual breeding groups per cage to avoid competition and ruining of eggs, as well as reduce overall stress for the breeding pair.

The incubation time for eggs is about three weeks so if they had not hatched in that period they were likely not viable and it is possible the female kicked the eggs out of the nest. You can check the bottom of the cage to see if any egg pieces are there. Making sure both birds are on a balanced diet with calcium supplements for the female and enough natural sunlight can also help ensure healthy egg laying if you are looking to breed.

It may be that the egg was actually pushed out of the box as it is not viable. If they will not let you in the box (where there may be other eggs), or the egg is not viable, you can simply remove it. Otherwise, waiting until night when both birds are calmer and quiet may give you a chance to place the egg into the nest.