If wasps become a problem, blast them with a high- pressure hose. Scrape
mud dauber nests early in the season for better control. DO NOT USE PESTICIDES!
Check bat houses for bats once or twice a month in summer and then once
each fall and winter. After bats are established, check only a few times
per season.
To check bat houses, briefly shine a flashlight into the house.
Be careful not to touch the house and be as quiet as possible.
If the wood of your bat houses begins to warp, especially near the top,
seal any gaps with silicon caulking. If the warping is significant, build
a new house. Drafts keep bats from efficiently trapping body heat and from
maintaining optimum conditions for rearing young.
Besides mounting bat houses, you might consider wrapping corrugated metal
around tree trunks to provide summer roosts for tree-dwelling bats.