Ecologists Claim Birds Disappearing From Quitobaquito Springs Due To Border Wall Construction

September 2, 2020
Quitobaquito pond during better times/Patrick Cone file

A group of ecologists say construction of the border wall through Organ Pipe Cactus National Monument has caused nearly 50 species of birds to abandon Quitobaquito Springs, a vital resting place for wildlife/Patrick Cone file

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.

"Many of these are migrants that rely on Quitobaquito as one of the few well-watered stopovers in the borderlands. Remove one more stopover in the entire migratory corridor across the vast Sonoran Desert, and you break a link that may have kept the whole migratory chain functioning," he added Tuesday in a release. "The next stopover habitat in this arid region may be dozens of miles or farther away, causing exhaustion, starvation, dehydration, or even death, in migrating birds.”   

According to the ecologists, 47 species seen between January 2016 and August 2019 have not been observed again at the oasis since the September 2019 initiation of border wall work that has come within 120 feet of the oasis. Two-hundred-thirty-five species of birds have been recorded at Quitobaquito over the last 80 years, making it the richest site for bird diversity in the entire Sonoran Desert network of National Parks and Monuments, they said.

The data analyzed comes from a half-dozen research surveys of Quitobaquito oasis undertaken by professional wildlife biologists working for the National Park Service and other agencies, and from vetted data provided by both ornithologists and expert bird-watchers involved in Audubon Christmas Counts and Ebird postings managed by the Cornell Lab of Ornithology.

Among the species that seems to have abandoned the Quitobaquito area is the Willow Flycatcher, an endangered species, they said.

This finding from ecologists and ornithologists suggests that a quarter of the riparian and wetland birds have temporarily or permanently fled as their habitats have been degraded, or depleted by the construction, according to Dr. Gary Paul Nabhan, a University of Arizona research scientist who has studied the biodiversity of the Quitobaquito oasis since the 1980s.

“Desert oases like Quitobaquito in Organ Pipe, Hunter Hole on the Colorado River and the cienega wetlands at San Bernardino National Wildlife Refuge are suffering from the negative effects associated with construction of the border wall," said Nabhan. "Additional riparian habitats close to the border along the Rio Grande, San Pedro, Santa Cruz and Colorado rivers will soon be affected by the wall construction as well. These activities are adding to the many stresses already affecting these oases, pushing their imperiled wildlife over the tipping point.”

Earlier this summer a group of 25 scientists wrote the U.S. Army Corps of Engineers to express their concerns that the use of groundwater for the construction had nearly drained the pond at Quitobaquito. The loss of water led to a loss of migratory waterfowl and wading birds, they said, and the rivulets that come down the hillsides to feed the pond were vanishing.

While Nabhan said now that the water levels are rising in the pond, he pointed out that "only two cottonwoods of any stature remain on the pond edge and the few willows remaining all show signs of drought stress and impending death. These two riparian tree species have been historically important in luring and sheltering dozens of bird species."

Jonathan Lutz, executive director of Tucson Audubon, said all the activity associated with the border wall's construction poses threats to wildlife that normally use the area.

“Birds and wildlife do not recognize political borders - and can often be casualties to decisions made without their needs in mind," said Lutz. "The growing border wall on the US-Mexico has proved to be just such a threat. Construction activities, bright lighting, large barren stretches of land, and many other aspects of the border wall, are direct threats to the migratory birds and resident birds of Southern Arizona. The waivers that allow these activities to occur with no environmental review must be overturned and border wall construction halted.”

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