E.L. Karsten 1954 Bufo canorus (35) June 19 NE side Tuoga Pass Ranger Station, Mono Co., Calif. now see eggs in bottom, mostly hidden by silt, where B's C had been. Water depth less than 1", average 1/2". Eggs to tail bud stage, none hatched into tadpoles. These live margin of the shallows, and are spread no more than 2-3 deep over area 4 feet x 12 miles. Water temp for 12:03 P.M. (D.S.) 23.5° C. in full sun. Air temp some twice 3" over dense grass 18.8° C. (hills shaded) Spacing of the adult >7/2 averages about 25 feet though, as mentioned, they do come right in contact. As I now write, A is in same position as before, E is 8 feet from end of mile and either C or D is 10 feet east of E. Apparently N A has been triggered E by food further off and has started E, C joining in right after. Sequence may be reversed. Point is that one C will act as definite stimulus to others. Some situation as at Kuen Pass. I was 2 feet from C taking these notes. If I stood up he stopped calling, 12:14 P.M. Another 3/3 complex involving A and other food which apparently were in view and I overlooked. Short dove-like notes are given, 3 or 4 at a time, as release notes. At 12:15 I walked wider in area. They are louder to see size as I walk near any of them doing themselves in the silt of the pond bottoms. At 12:42 P.M. I came on a shallow