man-made piles of rocks (= shelter hunting ?). In two places were very large rat-sized tracks, hence at least 3 sp. of rodents in this Tillardia. Also tracks of Burhinus but didn't see the bird. Picked up these tracks, and looked for better habitat east of San Bartolo. Went about 4 miles up Front on an army artillery range where there was lots of Tillardias, but mostly dead, then about 4 miles up a valley to the east of San Bartolo past a cemetery and narrow trail. Stopped where the valley is about 1/2 mile wide with rocky Tillardia on the north and sandy Tillardia on the south; the dry wash in the center has a few pepper trees and numerous but isolated flowering plants, many of them growing out of slightly damp grey threatened into gorgeous sand crakes. The big Tillardias on the rocky north slope stops right at the bottom of the slopes and is replaced on the flats by the small-leaved (1-inch) species (which are very scarce and scattered). At about 1:30pm put about 35 small Sherman hunted with oats + corn up a ridge through rocky, pure Tillardia. Not many refuges, and saw no mouse tracks or droppings. One red-tar Robin past but no pellets. Sole for droppings. On the way down a steep rocky gully with very sparse Tillardia I saw a rusty artillery shell and upon looking into its cavity saw a spider exoskeleton and a few Gecko. We have looked under hundreds of