Hartfield - 1934 Lap Ranch, Colorado R., 1/2 mi. S E Searchlight, 500+ft., Clark Co., Nev. January 17, 1937 This catch, it seems to me, is phenomenal for a second night's run of the same trap line. Logically, since many of the Dipodomys have been trapped out, one would expect something of the kind, but hardly on such a large scale. To determine the extent of the mammal population, I shall leave the same 100 traps out a third night. Saw a flock of 7 or 8 mountain blue- birds this morning, and Fitch shot one for identification. In the afternoon Fitch and I were out hunting and saw another block out on a grassy field near the ranch. They perched on dead weeds and on small mesquite bushes in the middle of the field, and were fairly tame. The wind was blowing somewhat and we saw one of the birds fluttering stationary in the wind as a sparrow hawk is wont to do. Later we each shot a chipping sparrow from a flock of 4 or 5 on the edge of the same field. They were perched in a mesquite tree. A few minutes later we saw a flock of 6 or 7 western Mexican bluebirds and obtained 3, one male and two females