Dave climbed up to the condor cliff, leaving camp before daybreak. Saw and heard lots of mice on his way up to the cliffs. at about 6:30 am I did a slow walk down our grid and look looking for birds, then a detour to the coral above camp. The bird scene is dominated by the groups of rufous burrowing owls. Saw 2 or 3 mice and about 4 thrush-like cloudnoses, nothing else. Both Dave & I in the middle of the night heard a burrowing owl coming creeked and while trying to see him saw a faint flash of light (?) apparently eventrating from the owl. We all agree that the mouse invasion didn't start until after the moon went down (about midnight). Drove to Tacna for shopping, then to Tarata. A little water in the river at Rock Camps (10,000 ft), and a little green on the hillsides. Arrived at acacia camps (11,500 ft) (mountain scrub) at dusk, cloudy, but cleared during the night. march 12 Mountain Scrub. Lots of dew, no frost. Clear. The campsite is a green carpet, damp or soggy. Lots of green bushes and flowers. Cactus bushes not blooming, and greenthorn not blooming. Saw a "flock" of 6 Patagona chasing eachother, walked over part of grid and saw porocheeta on ground, Geositta curvebill, asterias, orange-barked shrubs. Zootrichia's not seen singing redhearts. Quite a bit of grass and laurelflowers on grid. Tallest cacti are 8 ft, no cactus flowers, numerous puffballs up to 1 inch diam. Lots of yellow-flowered daisy bushes, surely