16 Feb. (cont) area. We handled about 100-110 birds, mainly Laysans, in addition we banded some Bonins. Got a return on one Bonin with an egg in the oviduct - 753-33861. Jim Priest on Midway is finding now many Bonin's with eggs. In SA2 handled 11 Bonins - sad news - only 4 had been previously banded. Is there no end to the number of birds using the area. 17 Feb. Today I checked the Blue-faced Booby colony every hour. There were few birds early in the day, but the number throughout the day was high - there are now 9 nests, one of which (4) has been abandoned. The number of males vs. ♀ incubating did not seem to change appreciably during the day and night. There were 3 ♀ and 5 ♂ at ☐ 0716, 4♀ and 4 ♂ at 1200 and 1700, and 5♂ and 3 ♀ from 1900 to 2300. Slight increase in the males on eggs at night. The locations and individuals present at 2300 were almost identical to those of 1900, almost no change at all - 7 new individuals had come into the colony. Alan put metal numbers on the last of the blank beach stakes, so that is all done. At 1600 on Bob and Alan counted the ratio of marked to unmarked Laysans in the Central Roost area. They found 86 marked birds and 154 unmarked, or 36 per cent marked. We have marked a total of 272 birds in the central roost, so this gives us a minimum of 2500 birds using that area. There is a tremendous turnover rate, and although perhaps 300-400 birds will use the area at a given time, a great many more, over time, come in. We weighed and measured the seal pup again, it has grown slightly, with new measurements as follows: Wt. 40; TL 45"; T 2 3/4"; FF 9"; HF 8 1/2" long x 12" wide (stretched); G 27". There were no teeth, and the umbilicus has sloughed off. The young crawls well and bleats in response to the mother, who follows us where- ever we take the young. 18 Feb. Activity study all day. It should be called an inactivity study again, as there was almost nothing happening, and the latter 1/2 of the day it rained and rained. .21" by 1800, and much more during the night. At 0700 there were 19 RFB and 5 Frig. in the roost. Things deteriorated all day, most of the time