Northern Prairie Wildlife Research Center
. . . Coming Out of the Dark
Bat House Management
- 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
- 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.
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