Marshall, 1941 Nephorettes le nigra San Juan Island, San Juan Co. Wash. June 23 On highest ridge north of Friday Harbor. At sunset, was hunting nighthawks here & found that there were about 20 bl. swifts foraging with them. The swifts did not come within 100yds or so of ground. Clear & calm. Early July - at the U.S.W. Oceanographic Lab - one afternoon a flock of black swift came low (not within shooting distance) over the labs. Was a clear, sunny afternoon. August 2 at the edge of the town of Friday Harbor. Rainy afternoon, low clouds. At 6:00 PM noted a group of nighthawks foraging about 50yds in air & lower. With them about 15 barn swallows & 20 or more black swifts very low looked almost as large as the nighthawks. They were flying & soaring exceedingly slowly, just floating about, so that I probably led ' too much but finally hit one - couldn't find it.