The number of elephants in the African savanna is in drastic decline, their population having dwindled by 30 percent between 2007 and 2014, according to the Great Elephant Census, the first-ever pan-African survey of savanna elephants. The recently released report [3] was funded by philanthropist Paul G. Allen. This extraordinarily detailed and comprehensive effort, which required the participation of 90 scientists doing on-the-ground …