What do you find on a saguaro cactus?

"Did you know that a Saguaro cactus can live for more than 200 years and grow as tall as 50 feet (15 meters)? Readers will discover how these desert giants are used for shelter by animals such as woodpeckers and owls, and provide food for animals such as bats and other small mammals. This captivating title provides a close-up look at the plants and animals that live in and around the Saguaro cactus in the Sonoran Desert."--Provided by publisher.