Carl Pearson 1969 Journal 4 July Papa León Treee which I followed through some Tillandsia + then up off over the dunes for a good long ways before I lost it. Up in the dunes, where there's nothing but sand, I also saw mouse tracks. The bird tracks for awhile followed the tracks we had made the day before. Down in the arroyos AKP saw hummingbirds. We saw a sparrow hawk down in the lower river bottom. End of afternoon we returned to Quebrada Cuy de Hueso, and I hiked up the ridge with Tillandsia to the dunes and then up to the top of the mountain, Mt. la Chimbomba we think. On the depressions on the lee sides of dunes were collections of small snail shells of several sorts and seeds. sometimes cases of insect pupae AT the top of the ridge of dunes were fox tracks, supposed Burhinus tracks, probably mouse tracks, and tracks of some passerine (1 ½" long). The passerine jumped + scratched along places where sand was falling off the face of a ridge. Up beyond the sand and on to the top of the mountain was fields of lichen covering earthy or sandy or mixed soil. There were lots of the small burrows with little piles of dirt at the mouth like we see down on the flat. Saw a pair of sparrow-size birds w blackish, short tail. Under a few rocks that were at the top were several large crickets. Coming down the steep, sandy face of the mountain, between two rocky ridges, I saw lizard tracks. On the rocks I found 2 lichen-covered