Hi there! I’m sorry to hear that you have a problem with larvae in your baby birds.
Unfortunately, this is a common issue in birds of this species, but there are a few methods you can try to help get rid of them. First, thoroughly clean the nesting box and surrounding area with a 50/50 solution of vinegar and water. This will help to kill any existing larvae and discourage new ones.
Second, keep the nesting area dry and protected from the elements to discourage the larvae from returning.
Finally, if the larvae are particularly persistent, you may want to consider using a chemical larvicide, following the instructions on the package carefully. If you have any other questions or need more help, please don’t hesitate to ask. Good luck!
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