MacLean 1966 over stream - possibly activated by passing parasitic jaegers. Saw a flock of 56-60 Long tailed Jaegers, and collected one. Returned to top lines to help Tom finish setting, then returned to the lab. Spent the rest of the after evening doing a live-mourn of the jaeger. It's stomach, as those of the other jaegers I've seen, was jammed with Tipulids. The insect peak seems to be definitely passed. Even in good weather this morning, saw only a few Tipula. The tipula flights seems to have been less decisively peaked than Priocerca and Pedicia, which were very synchrous and short term. Makes one wonder about (1) timing and synchronization mechanisms; and (2) the life span of a single adult tipula. Have been seeing dead tipulids - mostly ? Tipula and Priocerca - lying on the tundra. 20 July Barrow, Alaska In keeping with my screwed up circadian rhythmicity, worked late and slept late, thereby missing a much needed breakfast.