Has anyone else experienced a near wipe out of their bat population?    We've always had hundreds nest in a bat house we put up behind our sauna to distract them from the siding.  (east end of Is. 748)   I have yet to see any flying at dusk and can hear only a few in the bat house.   I used to curse them for nesting in the siding and now I'm thrilled to have heard a few there as well.  Is it the bat blight (white nose fungus) that's sweeping across the NE??   I saw one dead bat but it didn't…