Christman 1960 Hyla arenicolor 7 April Pat Holes, Indian cave, Joshua Tree Natt. Movement. San Bernardino Co., Cal. Many were heard calling last evening and this am. Saw a half dozen or so in the potholes proper. They were in the water and on the walls of the 2-4 ft. deep cylindrical holes. Most faced down toward water - their feet were tightly pressed beside and under the body. Most seemed to rely upon their protective coloration and did not jump into the shallow water of the pothole. One on the sunny edge of the granite hole swam to the shaded deeper portion.