When is the right time to clean out vacated nesting boxes?
Briefly

Wendie seeks advice on when to remove a bluebird nest after fledging, noting prior experience with unhatched eggs. Joan asserts it's essential to wait until chicks have fledged before cleaning nests to avoid legal issues. Once cleared, it helps prevent insect infestation for future occupants. She advises wearing gloves for safety during clean-up. In a second question, Kristin inquires about larger ants replacing Argentine ants, with Joan explaining that California has various ant species, including carpenter and pavement ants, especially noticeable in warmer months.
Once the chicks have fledged or it's clear the eggs aren't viable, it's a good idea to remove the nesting materials to tidy up for the next users.
It's against the law to remove or disturb active nests, so ensure the chicks have fledged before cleaning the nest box.
In the fall, it's safe to give nesting boxes a good cleaning as birds will use them as temporary shelters despite not nesting.
California has a variety of ants; while Argentine ants are common, there are also carpenter, pavement, and little black ants that can be found.
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