While exploring Cold Canyon Preserve near Calabasas, California I discovered Camponotus yogi, an odd and cute carpenter ant. These guys were nesting in the base of a dry yucca flowering stalk of a SW facing slope. About 20 yards away in a moist ravine closely related Camponotus clarithorax nested in a fallen and rotted oak branch. As with many other cavity dwelling ants, i.e. Leptothorax, the actual occupied nesting area within the fallen branch was devoid of rot and fungus and quite dry. Both of these ants are endemics to California.