Pat Groller, of Preston, Md., a volunteer with the Nature Conservancy, arrives at a trap she set up at Dorchester Pond. She collects whatever has been trapped from three sites every week to send to Sam Droege, a Researcher with the USGS Bee Inventory and Monitoring Lab. Droege uses the data to study the population and types of native bees that are in the wooded areas of the mid-Atlantic region.
Kenneth K. Lam, Baltimore Sun
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