Behle 1934 Byron Hot Springs, Contra Costa Co., Calif. July 29 the larks abundant. In driving around the region we found an area about one-half mile west of the Hot Springs. Here an irrigation canal, cement bottom and several yards wide, flowed north and south. Some 50 yards north of the road was a body of water forming a semi-swamp. It gave evidence of having recently receded because mud was still soft in low places. A herd of cattle grazed around and where the area was soft their hoofs had sunk making small hollows and rough turf. In the higher areas it was extremely dry with little or no vegetation except some dry grass and foot high weeds. In this area on both sides of this water were hundreds of horned larks, I should say almost thousands. For the most part they were quietly resting on the ground. Some were feeding, others were squatting in the shade of bushes. They were in great flocks of 50 to 100 in a group. When I would shoot perhaps several hundred would rise and be in the air at once. In some cases there were a few that seemed isolated. In