James P. Ludwig 1963 2 isn't being used and something other than available nest sites must control their numbers. Red-tailed Tropicbirds were not observed about the island or attending to their chicks until 1000: The peak of Tropicbird activity occurred between 1300 and 1400 today and I captured several adults on the ground with chicks then. Went to the Bonin Petrel night roost at 1900; first Bonins overhead at 1908, their numbers increasing rapidly - perhaps 100 flying about by 1915; 1923 flying within 5 feet of their roosts; 1933, first Bonin on the ground, Bulk were on the ground by 1950 although some were still flying. In an hour I had captured 4 banded birds; three collected for skins. One was taken for a skeleton. Midway Island, September 8 Spent much of the morn ing finishing up the Shearwater skins. After lunch I walked around the island and saw a lot of things which I could not name. Again, I am in need of a Peterson. There are at least five kinds of terns and noddies here. Three Frigatebirds were seen. Many Tropicbirds as they are apparently in the height of their nesting now. Many Fairy Terns. Counted 31 Bristle-thighed Curlews, many Golden Plovers, and five other shorebirds which I did not recognize in their winter plumage. One Turnstone seen. One Shorebird caught alone at the end of the runway - wing on left side had been sheared off- saved for a skin (Golden Plover). Most of them at East end of the island in a trough to the right of the Navy Pier there. Most of the Terns were on the South end of the island. Albatross and Boobies were conspicuous by their absence. In the evening I stopped again to catch and watch the Petrels. Overhead 1905, flying lo w over ground at 1921, first on ground at 1931, bulk on the ground by 1950. This roost is located just behind the school where the grass is deep and underlain by sand. There were 60 birds on the location by 2050, and in 2 hours I caught about