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These three bat houses were mounted to provide a home for bats at Greenfield State Park in Greenfield, NH.. The bats formerly roosted in the vent but when wasps entered the building through vent screening was placed over vent on the exterior which unfortunately excluded the park's valuable bats. They now have a suitable home and the population has more than doubled since mounting.
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Two single chambered bat houses mounted on a 4-H building in Ashby, MA. USA. These and other bat houses at this site have been mounted as part of a bat relocation effort which is meeting with success. Two little brown bats (myotis lucifugus) took up residence in one of these bat houses the first night after mounting. 4-H being a wonderful center for education, bat conservation efforts and awareness has a bright future here indeed...
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Three large multiple chambered bat houses mounted on rear of brick historic school house in Shirley, MA USA. Formerly roosting in the attic, this large colony of big brown bats started to take up residence the first season after erection. Efforts are underway to completely exclude bats from the buildings' interior. Brick buildings gradually absorbing heat by day and giving off heat slowly by night are often ideal roosts for bats.
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6 large multiple chambered bat houses mounted back to back are easily raised to mounting grid affixed to two poles at Batnic in Shirley, MA USA. These bat houses were identical on the outside but had differently designed interiors to test bat preferences. Much has been learned from bat roosting behavior. Unlike trees, bat houses mounted on poles/posts enable bats to easily access the roost and not be subjected to obstacles.
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Two bat houses mounted on a nearly dead tree at Batnic in Shirley, MA USA. These bat houses sized 16 inches wide by 32 inches tall, mounted 18 feet high, attracted more than 20 big brown bats the first spring season after previous fall mounting. Each bat house has 30lb. felt paper on upper exterior half to enhance solar heating. See the next photo (below left) showing the big brown bats that occupied these bat houses.
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Photo of big brown bats roosting in bat house mounted on tree depicted above. Most of the bats routinely chose the center chamber which was least effected by temperature extremes for the interior wood partitions extended to interior ceiling. These bats usually abandon roosts when temperatures exceed 95 degrees Fahrenheit. This photo could not be taken until a July day in which outside ambient temp. exceeded 85 degrees f. which forced bats to bottom area of bat house enabling this photo
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Batnic 2000-2003
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