Koford, R. 1976 Journal White Cloud campground, 4300ft., 11 mi. E Nevada City (by rd.), Nevada Co., Calif. 30 July I opened the 27 traps N of the Hwy, then spent the morning in the campground with the tape player, getting one territorial response to a playback. I also took a few notes on some squirrels. I picked up the traps around 1100 and left at noon. Wind NE light, sky - 70% cloudy all morning, temp. 68° F at 0800. 10 Aug. I spent 0645 - 1045, & 1745 - 1900 in an area S of Hwy 20 near the mile 31 marker - 1.5 mi. E of the campground by rd. - collecting squirrels. At ~ 0700 I collected a juvenile which turned out to be a ♀ - after being attracted to the area by a high chir. At 0845 I collected a squirrel, which turned out to be a scrotal ♂, after being attracted by an alarm call which stopped when I got close. At 0920, attracted by a falling cone, I collected a small squirrel which turned out to be a scrotal ♂. It gave a couple alarm notes. Wind was light, sky has lazy clouds, temp. was 74° F at 1730. 11 Aug. I spent 0710 - 1200 in the area S of the Hwy near the mile 31 marker, trying to find females or juveniles to collect. I couldn't determine the sex of a couple squirrels, nor saw one scrotal ♂, so I didn't collect any. I then went into Nevada City for dry ice and supplies, then spent 1730 - 2035 in the 1st study area, seeing a weak approach by a ♀, seeing a marked squirrel go into a hole, and a ♂ - probably lactating - stay out until well after sunset. The sky was clear, but I could see heavy clouds on the E horizon when I went into Nevada City. Wind light. Temp 78° F at 1500, 68° F at 2100.