• Dave Harmon, PW editor

Scientists: Fewer bird species visiting key spring in Organ Pipe Cactus NMon after border wall built

Nearly 50 bird species have been absent from Quitobaquito Springs in Organ Pipe Cactus National Monument in southern Arizona since the U.S. Army Corps of Engineers began building a wall in a bid to thwart cross-border crossings, according to ecologists.

“We have seen a drastic reduction in use by waterfowl, wading birds, hummingbirds, hawks, and songbirds that rely on riparian trees, including cottonwoods and willows, for roosting and nesting habitat, or that rely on insects in or above open water and surrounding vegetation for food," said Dr. R. Roy Johnson, the dean of riparian ecologists in the Southwest, a University of Arizona affiliate, and retired research director for the National Park Service.

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