Murray 1948 84 Journal May 25 El Carrizalito, 1400 ft., 5 mi N Santiago, Baja Calif. Made of concrete with water within an inch of the top. Large boulders enclose it and a brushy fence is just below. Bats were flying around it when I arrived [in early dusk]. Most were drinking, coming in low consistently from two directions which were most open. Few stopped to feed though they could be seen feeding a short distance away. They very distinctly came in waves, 6-10 at a time though some might have circled back again. However there weren't often more than 2 or 3 over the pool at one instant. These did not necessarily come from the same direction. Then came a lapse of 1 or 2 minutes during which very few single bats came, and another group would arrive. While still daylight I caught only pipistrelles and Myotis. After it became dark I used a flashlight to light up the pool which did not seem to bother them in the slightest. The numbers tapered off a little after it had been dark for a little while. At about 7:45 I caught a Lasurus borealis. By 8:00 the pipistrelles were still coming around. After this time the bats were noticeably