Bird rarities and vagrants - naturestoc

Mountain Bluebird flock on Waverly Rd. San Joaquin co. CA 1-30-10. (VIEW AT XLARGE SIZE). I count 126 birds on the fence in this photo and there were more on the fence to either side plus birds on the ground in the area. My estimate for the total size of this flock is 300 individuals but this could be too conservative!