At the intersection of Bandy Canyon Road and Ysabel Creek Road is the Ysabel Creek Road Staging Area for part of the San Dieguito River Park trail. Just east of this parking area is an acre or so of thick prickly pear cactus.
|Prickly pear cactus. Ysabel Creek Road, Escondido, California. April 3, 2016. Greg Gillson.|
|Cactus Wren. Ysabel Creek Road, Escondido, California. April 3, 2016. Greg Gillson.|
So between these two locations you should be able to easily view Cactus Wrens in western San Diego County (at least in the North County). Of course, you may drive eastward over the mountains to the Anza-Borrego Desert and find Cactus Wrens in the cholla cactus there (see this previous post).