North (copy) epn 4 Arroyo Seco, 12 mi. S of Palo Verde, Imperial Co., Cal. P. Dec. 21/1958 Saw flock of Gambel quail this morning. Temp. 43° F and Koford shot one with 12 gauge shot gun at 6:45 AM. They broke up into pairs after being shot at. There was no rain this morning but a cold S wind is blowing. Mosquitoes were numerous last night. After lunch Koford and I walked down to edge of Colorado River - vegetation was as follows - first, that is nearest to camp was belt of mesquite which gave way to screwbean closer to their river where it seemed to moister, scattered sometimes in the screwbean but usually closer to the river were cottonwood trees, after the screwbeans, and forming a very dense growth close to the river and was arrowweed (Pulchea ericea sericea) and at the edge of the river some willows and many cottonwoods. We found an open space 2 or 3 hundred yards long and about 75 or 100 yds wide that had grass and was flooded. The area was flooded at the time and no attempt was made to identify the grass. We walked upstream along the edge of the bank until opposite the N side of the arroyo and then back in towards it.