The forked pleat on this saguaro's epidermis tells us the ribs on The within have forked to enable the saguaro to expand. NPS Picture / T. Wiewel” Saguaros give habitat for sensitive cactus ferruginous pygmy-owl and endangered lesser very long-nosed bat. A result of the built-in risk of prolonged drought and invasive grasses, Saguaro Nationwide P