Of particular concern are primates, which as a group are already among the most endangered species on the planet. Some monkeys, like the Yucatan spider monkey and the black howler monkey have been documented in studies as adapting to habitats that have been ravaged by cyclones in the past (over 90 percent of their known habitats have been affected at some point). The hope is that other primates will be able to do the same. But there is absolutely no documented evidence to suggest that they will be able to cope with extreme drought and other conditions that are predicted for the future.