J P Myers 1977 Journal Atkasook, Meade River, N. Slope Borough, Alaska. 5 June (cont'd) [Ph. fulicarius (cont'd)] seen on 5 June - pair of RPI's chased away from area by another 8 of another pair. 8 chosen seen regularly common Ph. lobatus - First seen 1 June when a few pairs evident in air (<10). uncommon thereafter through 5 June. all birds paired by then. Too few to separate habitat from Ph. fulicarius. Present in small tundra ponds to margins of large lakes. not in upland tundra. Larus hyperboreus - individuals seen regularly 31 May -> 5 June. Paired by 3 June on at least 2 lakes, although not circulatring. Little apparent display activity. Most birds around an adult. 1st year seen. No 2 year. At least 30 in Atkasook area Xema sabini - seen on 2 separate occasions (with ten pairs of gulls flying to NE, 3+5 June. 6 June Sterna paradisaea 1 June first appeared flying overhead. a few seen 2 June. By 5 June regular (>20 seen) including several carrying fish over the tundra between ponds. Isolating in pairs by 6 June + sitting on pond islands along transect 11. Stercorarius pomarinus - seen moving through each evening, often in large flocks up to 25-30 birds. all headed NE. Individuals also party by in same direction. Most evident evenings 2-4 June. No display seen, little foraging +dispersed St. parasiticus seen 1 June on. Small numbers, but some displaying. met cup-t wing raising seen by pair on lake island in (10,36) on 4 5 June. 2 June, pair seen dive bombing Nycticorax scandiacus out on river loop near (21,38) St. longicaudus. Individuals seen by 1 June. Displaying 4 June. 5 June active territorial chase on ridge west of camp - pairs continuously chasing over ridge Flight display w/ flapping wings, gliding, screaming. Chaos parasiticus