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U.S. Department of the Interior
Historically, abundances of migratory birds have been estimated by skilled pilots and observers in fixed-wing aircraft who identify and count birds using ocular estimation techniques. However, the number of skilled pilots/observers is limited, and the USFWS needs to explore cost-effective and safe alternatives to assess the status of migratory birds. The use of small unmanned aircraft systems (sUAS) was explored as an alternative.
Vegetation mapping of the public access side of Desert National Wildlife Refuge (NWR) began in fiscal year 2011 and will be completed at the end of fiscal year 2012. The vegetation mapping is being completed with extensive field surveys and use of QuickBird imagery.
Malheur Lake at Malheur National Wildlife Refuge in Harney County, Oregon, is the largest freshwater marsh in the western United States and historically one of the most productive migratory waterbird habitats along the Pacific Flyway. The lake’s size is highly dynamic, a result of being shallow, within a closed basin, and replenished primarily by runoff from spring snowmelt. To improve our baseline knowledge for habitat management and monitoring, a terrain model of the lake bottom was needed in order to construct a better area-depth-volume relationship and evaluate lake-si
