Murray 1949 Sciurus griseus Sept 1 3 mi N Willow Creek, 700ft., Humboldt Co, Calif. Encountered one on the road just up the hill from camp. It immediately ran up into a fair sized tanoak tree and began repeatedly giving a sharp call, having a squeak to it but with a deeper tone involved. Resembled a bark, and even more, a bicycle horn. Was quite excited and whole body gave a jerk with each note. Repeatedly drummed against the branch with one forefoot or the other, though made little sound. Had a threatening manner, or so it seemed. Kept this up for about 15 minutes, even when I sat down and was immobile. As I walked down the road, could hear the call as long as was within earshot.