1) There are two types of zebra societies - plains zebras and mountain zebras which have closed membership, while Grevy's zebras and Asian wild asses have open membership. This matters because wandering males in open societies don't protect females and young, putting them more at risk of lion predation. 2) Grevy's zebras don't like black cotton soil, which can lead to poor performance in hybrids. 3) Some Laikipia zebra populations are declining, with actual populations lower than theoretical populations, indicating new approaches are needed to balance protecting at-risk species.