In 2010, the Pacific Region of the U.S. Fish and Wildlife Service (Service) initiated a native bee sampling program to document the bee fauna at 15 National Wildlife Refuges (NWR), 1 National Monument, and 1 Bureau of Land Management site in Washington, Oregon, and Idaho (hereafter referred to as Refuges or Sites). This program was comprised of six sampling components, utilizing two methodologies depending on the available staff, site objectives, and accessibility. For purposes of data publication, these components are summarized as follows. [Description continued in original data source.]

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