I checked my bat houses this past weekend at a park in northern Ill.There are a total of 14 houses at the park.Houses are grouped in pairs back to back,one group of 3 ,and one group of seven.
Several years ago there was a red bat in one of the houses early spring.
The houses in the group of seven consist of Hans Weber stlye Medex wood, large Penn. state, BCI nursery Medex wood, Hans Weber plywood,plastic insulated stucco finish Maberry, med. Penn. state finished with Rhino-Guard truck be liner material,BCI plywood nursery.
The house with the most bats by far was the Medex wood BCI nursery,it was almost full of little browns. The other houses had maybe 10 bats in all.Some never had any bats in them.
The group of 3 houses English style Medex wood, Rhino-Guard sprayed med. Penn. state, and a single chambered rocket box. Again the Medex wood English style had lots of bats in it,big and little browns.The Rhino -Guard med. Penn state had 2 little browns in it and the rocket box couldn't see or hear any bats in it.
The weather here has been below normal temps. most of the spring in the fortys. Last week had a warm spell 70 -80 which brought some bats out.
Kent really good news about your little browns. What state are the bat houses in question located in? And if you ever have a chance to photograph them it would be great to see them occupied or unoccupied. And boy has the weather been crazy here in Mass. Last week we had a day in the 90's and 5 minutes ago it was snowing outside my door.
Hey, Im going to have to try one of those BCI nursery houses. The success rate sounds pretty good. The bat house I currently have up is the old style; it is deeper and not as wide as the newer models. The temps. here in Michigan lately have been in the high 80's/low 90's so I hope it doesnt get too hot for my little bat family.