My wife heard some rustling in our gas fireplace exhaust. There’s a gap. The 27 second video shows them peeking their heads out. So…I plan to seal it at night when they fly out, but there are two that flew out. Is it a Family? My concern is if I turn the heat on during winter, will there be any harm to my family inside the house? I alsowant to make sure the little critters are all out too
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