One reason I haven’t posted as often as I would like here is that I was feeling a bit depressed since it seemed that all or almost all the bats had rather suddenly left the bat house in July. The number of bat transitions — bats passing in or out of the bat house opening — had plummeted.
In June, I logged an average of 64 transitions per night, with at least a few detected every night. But in July, the number dropped to 38, and there were long runs of zero or very few ins and outs. Strange. By early this month, things were very quiet around the backyard.