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    • Maggie Simmons

      Dr. Charles Campbell and a “municipal bat-roost” in San Antonio, Texas (“for one of man’s best friends”), his idea for mosquito control at a time when malaria was a major public health problem in the U.S. Disguised as a favorite bat habitat — a church steeple, complete with cross — the roost was fitted with a trapdoor and stilts to facilitate the harvesting of guano by the wagonload for use as fertilizer. 1914

    • Gwen Gemeinde

      A bat house the size of a human home To combat the spread of malarial mosquitoes in Texas in the early 1900s, bacteriologist and fledermaus appreciator Dr. Charles Campbell of San Antonio built this massive bat house (which was one of several). This roost was on stilts so that the bats’ nitrogen-rich guano could be collected as it plopped to the ground.

    • Ann Rodriguez

      Be sure and look at the man in this pic, to get a sense of just how big this thing is! Title from data provided by the Bain News Service on the negative. Photograph shows a bat roost in San Antonio, Texas with a sign: "A home for bats and belongs to the City of San Antonio. Bats are one of man's best friends, because they eat mosquitoes and mosquitoes cause chills, fevers and other diseases..." Forms part of: George Grantham Bain Collection (Library of Congress).

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