The secret lives of the wild asses of the Negev

The Asiatic wild ass (Equus hemionus) disappeared from the Negev, the desert region in southern Israel, in the 1920s. But a remnant herd survived in the Shah of Iran’s zoo. Some of these animals were reintroduced to the desert beginning in 1982. Recently scientists at Ben-Gurion University in Israel and Washington University in St. Louis have been inventing clever new ways to check on the status of these famously elusive animals.