One early March morning in southern Arizona’s Coronado National Memorial, an uneven line of scientists and amateur naturalists in floppy hats and hiking pants crept up a steep hillside through yellowed grasses and dark shrubs.
One early March morning in southern Arizona’s Coronado National Memorial, an uneven line of scientists and amateur naturalists in floppy hats and hiking pants crept up a steep hillside through yellowed grasses and dark shrubs.