National Geographic : 1997 Jul
A congregation of tamarisks stands on the shoreline at Eminence Break. Brought to the United States from the Middle East as an ornamental shrub nearly 200 years ago, tamarisks now crowd many western waterways. Here they offer food-hordes of tiny leafhoppers-and shelter to increasing numbers of birds, which in turn have drawn a healthy population of per egrine falcons. A Bewick's wren (below left), whose nest is hidden in a tamarisk north of Lees Ferry, has brought its brood a meal of insect larva. At Vaseys Paradise, an oasis marked by cliffside springs, the endangered Kanab amber snail (below right) lives on watercress, another introduced plant. This snail, like hundreds of others, was marked and removed to higher ground for safety and study during the flood of 1996.