Hi,
My budgies mate and then lay single eggs also she doesn\’t lay in the nest box i have made for them. i have put the nest box in three different location but she sits on the perch and lays from the top, so it falls and breaks. this has been happening for like 6 months now. also the earlier budgie who passed away used to lay about 4 – 5 eggs at a time but this one only lays one egg at a time and that to has no clue where to lay the egg. Please advise how to teach her to use the nest box, we also put hay inside but even that doesn\’t work. she enters the nest box otherwise.
She may not find your nest box safe for her. Is it enough spacious? Is it dark enough inside? I made a nest box it may help you. Try changing bedding, I used cat litter made of plant fiber. (Wood fibers) Good luck