Why do elf owls need the saguaro cactus to survive?

Elf owls rely on the saguaro cactus for nesting and roosting sites, as the cactus provides natural cavities that protect them from predators and harsh weather. The saguaro also supports their diet by attracting insects and small animals they hunt. Additionally, the cactus plays a crucial role in the ecosystem, providing shelter and food for various species, which in turn sustains the elf owl's habitat. Without the saguaro cactus, elf owls would struggle to find suitable nesting sites and food sources.