R. S. Crossin 1965 Red-tailed Tropicbird 18-21 July (cont.) this was quite dense. A few birds were found with partially - well incubated eggs but the majority had chicks of varying sizes up to adult size. The nests are deep shallowed out places in the sand, usually under dense branch formations of the Scaevola. Leaves and other litter usually appear in nests, but this appears accidental and not brought in by the parent birds. In places nests are only a few feet from each other. One egg per clutch. 7 August - No change in numbers, most birds on nests had chicks of various stages - no eggs found. 11 Aug. - Eggs of all stages of incubation found, and chicks of all stages. A few immatures with the flying population Blue-faced Booby - Laysan 18-21 July Ground nester, all with large young. In no case did I observe more than one young - although at Lisianski 14-17 a few pair still had heavily incubated eggs or an egg and nearly hatched chick. Apparently 2 eggs may be a normal clutch, but only one of the set ever hatches. Invariably the young bird is attended by one parent. At Lisianski the few birds still in mid-nesting stages showed no evidence of a nest being constructed to hold the egg - rather a shallowed out area on bare ground. Estimated population = 1,000 birds. 7 August No change - numbers of breeding. 9 August One adult blueface observed incubating a dried-up albatross egg - probably Laysan Albatross. Egg in a scrape on the west shore of lagoon. Many other rotten albatross eggs about. Brown Booby - Laysan 18-21 July On the night of the 20th approximately 6 pr were encountered in dense Scaevola while searching for Laysan Albatross chicks. I did not at that time have the means to check the nesting very closely, but 3 nests were noted - 2 contained 2 eggs each, the toeker contained one small young. The two sets of eggs appeared very dirty and enst soiled and probably were of advanced incu- bation. A substantial nest of sticks and grasses was constructed on the ground in each case. No other birds were seen during the visit. On Lisianski a small colony of about the same size was noted, but all chicks were running about and nearly full-grown. Estimated population on Laysan = 300. 7 August Estimated population between 50 and 100 individuals: 2 nests with 3 eggs each noted and one nest with 2 chicks. Several half-grown chicks about west shore.