_Food Habits._--The author (1948:58) reports that stomachs of birds taken at Ulithi and Peleliu contained fish, insects and marine crustaceans. Probably the birds feed to a large extent along the edge of the tidal reef. They almost certainly obtain food also on the islands as indicated by the presence of insects in stomach contents; this is not surprising since the birds frequent woodland habitats. _Remarks._--_Gygis alba_ is one of the most characteristic birds in Micronesia. It is seemingly more numerous at the coral atolls than at the high, volcanic islands. At the latter islands the birds prefer the coastal coconut grove environment. At Pau and Bulubul, two small islands in the Ulithi Atoll, the writer counted approximately 100 birds on August 21, 1945. Kittlitz was the first to publish an account of these birds in the Caroline Islands. Tetens, Peters, Semper and Kubary reported their presence in the Palaus. No doubt, these terns attract the attention of every traveler in the islands owing to their conspicuously white beauty and their seemingly friendly behavior toward man. Their habit of hovering in small flocks close over the head of the observer is indeed spectacular. =Columba livia= Gmelin Blue Rock Pigeon _Columba domestica [Greek: b] livia_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 769. (No type locality = Europe.) _Columba livia_ Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Marshall, Condor, vol. 51, 1949, p. 221 (Tinian). _Geographic range._--Europe and Asia Minor. Introduced to many parts of the world. In Micronesia: Mariana Islands--Guam, Tinian. _Remarks._--In 1945, the NAMRU2 party observed pigeons about the towns on Guam, particularly at the town of Inarajan. Bryan (1936:24) writes that the birds were introduced by the United States Navy and Marine Corps at Guam; the stock originating from escaped carrier pigeons. Marshall (1949:221) records this bird from Tinian. =Ptilinopus porphyraceus ponapensis= (Finsch) Crimson-crowned Fruit Dove _Ptilinopus ponapensis_ Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 779. (Type locality, Ponapé.) _Ptilinopus? fasciatus_ Finsch, Journ. Mus. Godeffroy, 12, 1876, pp. 18, 37 (Ponapé). _Ptilopus fasciatus_ Elliot, Proc. Zool. Soc. London, 1878, p. 536 (Ponapé); Tristram, Cat. Birds, 1889, p. 44 (Ponapé).