Saguaro (sa-wa'-roh) Cactus are 75 years old before they start to develop arms and live to be 150 years old.
The holes in them, such as seen in this one, are made by Gila Woodpeckers and Gilded Flickers and used for nests by them and other birds.
Saguaros are an endangered species and it is very illegal for people to damage them in any way.

Photographed in the Sonoran Desert west of Tucson, Arizona USA.
74351