Mayhew 1947 Mar. 1 Pine Siskin Strawberry Canyon, U.C. campus, Alameda Co., Calif. at 3 P.M. a flock of about 30 birds were found feeding about 30' above the ground, eating the seeds of the alder. They fed in a rather compact group near the tips of the branches where the seeds hung. The occasionally hung upside down while feeding. They fed silently for the most part, but uttered occasional notes that appeared to be used to keep the flock together. Upon becoming startled, they flew out about 30' to 50' from the tree in a compact flock, uttering a series of distinct notes, then all went back to the tree they had just left. The tail appeared distinctly forked. These birds seemed to move constantly about the outer edge of the tree. Mar. 8 at 10:20 A.M. a flock of about 30 were seen flying up and down the canyon. They had a bouncing flight during which they uttered high thin flocking notes.