We have the same situation and have been hearing chirps and movement in there for weeks. I fear the exhaust fan, which sometimes goes on automatically, will harm or kill them. How do we know when the babies have fledged? And then is it okay to clear out the nest, or will they all die? There aren't a lot of nesting sites around, so it feels kind of mean. But it's also unsettling to hear them just above our simmering dinner. I have not seen them so don't know what they are; the neighbor says sparrows. Thank you.