This story begins with an unexpected incident that occurred when a University of Arizona science writer was taking part in a popular Tucson activity: watching clouds of bats emerge from under a bridge in midtown Tucson at nightfall. While gazing skyward at the winged creatures, he suddenly felt a droplet fall into his eye. Was that … bat pee? To
In July, the monarch butterfly was added by the International Union for Conservation of Nature to its red list of threatened species, a recognition that the insect’s continuing decline could lead to extinction.