Myraul Leung 1969 journal 33 July 13 (cnt.) Papa Leon Tree, 150+ ft., Depto. Lima, Peru Probably a new Tillandsia bifurcates as it grows, the gravity causing it to become prostrate as it dies, so that the new growth is down the hill. Continued bifurcation + branching would then explain the rows. Dr. Pearson is doing food preference observations & experiments with the captured mice. There is such a big difference between Phyllotis anicetus and darwini. Anicetus is always moving and very active and quickle, while darwini is slow-moving and tends to just sit there. Yet in the study area, there are both species, living together in a niche that doesn't seem able to be subdivided. Why is there such a behavior difference? Perhaps it is because we are near the northern edge of the species range of darwini and the southern edge of anicetus. In their respective ranges the habitat + niche are probably greatly different. July 14 Went to check traps again this morning. Nothing in the snap traps. I collected them, as last night was the third and final night of trapping for that Calhoun line. Total catch was only one mouse. Catch on the grid was 13 mice, 12 of them recapture. Tonight we will set both shermans and snap traps at all the stations in an attempt to get all the