Cogswell 1949 Empidonax traillii Big Lagoon, 100 ft., Humboldt Co., Calif. Aug. 18. In maple creek canyon, about 1,2 miles S. . .4 mile W. of our camp, I collected two juvinal birds (#37 blue and 7517 Miller) from thickets of Elder (Sambucus racemosa) and Rubus parviflorus & R. vitifolius. They were flitting from perch to perch frequ- quently, always in the Elders, which overtopped the [illegible] other bushes by 2 ft. or so. Occasionally, it was fed by a 3rd bird (not obtained). This 3rd bird and at least 1 of the young called repeatedly a low wh-r-r-it to almost the regular "weeps" of the typical full songs of this species. The tallest trees nearby were some 10 ft. redwood sprouts from a stump on the slope to the east and a small group of 15-20 ft. alders to the south -- but these birds were not seen to visit either. The slopes above were covered with recovery vegetation as described in my journal. 1 Photo was taken of the habitat. Aug. 29-31 \frac{1}{3} mi. N Willow Creek, 400 ft., Humboldt Co., Calif.- Empidonax flycatchers, including several which close observation indicates are this species, are common along the borders of the woodland & berry thicket areas in the Trinity River valley. All are calling only a soft "pit". Several were seen out in the open dry field also where they foraged from will-bush bushes or even elm trees.