Dr. Lee Hannah, a co-author of the paper and chief climate change biologist at the Center for Applied Biodiversity Science at Conservation International. A recent study predicts that up to 35% of the world terrestrial carnivores and ungulates will be at higher risk of extinction by 2050 because of the joint effects of predicted climate and land-use change under business-as-usual human development scenarios. Climate change has advanced the time of evening when Brazilian free-tailed bats (Tadarida brasiliensis) emerge to feed. This change is believed to be related to the drying of regions as temperatures rise. This earlier emergence exposes the bats to greater predation increased competition with other insectivores who feed in the twilight or daylight hours. Some contemporary studies have argued that habitat destruction for the expansion of agriculture and the overexploitation of wildlife are the most significant drivers of contemporary biodiversity loss, not climate change. Said Daniel M. Ashe, former director of the United States Fish and Wildlife Service during the Presidency of Barack Obama: "The lie is that if we address the climate crisis, we will also solve the biodiversity crisis." Human overpopulation The world's population numbered nearly 7.6 billion as of mid-2017 (which is approximately one billion more inhabitants compared to 2005) and is forecast to reach 11.1 billion in 2100. Sir David King, former chief scientific adviser to the UK government, told a parliamentary inquiry: "It is self-evident that the massive growth in the human population through the 20th century has had more impact on biodiversity than any other single factor." At least until the middle of the 21st century, worldwide losses of pristine biodiverse land will probably depend much on the worldwide human birth rate. Scientists including Paul R. Ehrlich and Eileen Crist have argued that population size and growth, along with overconsumption, are significant factors in biodiversity loss and soil degradation, The 2019 IPBES Global Assessment Report on Biodiversity and Ecosystem Services, and biologists including Ehrlich and Stuart Pimm, have noted that human population growth and overconsumption are the main drivers of species decline. E. O. Wilson, who contends that human population growth has been devastating to the planet's biodiversity, stated that the "pattern of human population growth in the 20th century was more bacterial than primate." He added that when Homo sapiens reached a population of six billion their biomass exceeded that of any other large land dwelling animal species that had