Regarding the bittern in the Palaus, Coultas (field notes) writes, "Always found alone, never a pair. A bird that is not easily frightened. In the heat of the day, one finds it standing in the shade of a taro leaf quietly viewing the intruder and very reluctant about moving. I have tossed pieces of earth and sticks at the bird to encourage him to fly so that I would not blow him to pieces when I shot, but my efforts at dislodgement have been rewarded by harsh scolding squawks. It became necessary for me to move into proper gun range. I have also found them perched in low trees at the edge of taro swamps. In flight they are atrociously awkward. They can't keep a course and their legs dangle every-which way. Their jerky, slow flight usually ends abruptly when the bird becomes entangled in weeds or the branches of trees. Extracting himself from his predicament he is soon in another and invariably resorts to blasphemy." =Ixobrychus eurhythmus= (Swinhoe) Schrenck's Least Bittern _Ardetta eurhythma_ Swinhoe, Ibis, 1873, p. 74, pl. 2. (Type locality, Amoy Shanghai.) _Ixobrychus eurythmus_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Southeastern Siberia and Japan south to India and Malaysia. In Micronesia: Palau Islands--exact locality unknown. _Specimens examined._--Total number, 3 (2 males, 1 female), from Palau Islands, AMNH--exact locality not given (Nov. 19, 21, Dec. 3). _Remarks._--Coultas obtained three immature specimens at Palau in November and December, 1931. =Dupetor flavicollis flavicollis= (Latham) Black Bittern _Ardea flavicollis_ Latham, Ind. Ornith., 2, 1790, p. 701. (Type locality, India.) _Dupetor flavicollis_ Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 26 (Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam). _Dupetor f. flavicollis_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Guam). _Geographic range._--Central China south to Malaysia and India. In Micronesia: Mariana Islands--Guam. _Remarks._--Seale (1901:26) records a female shot at the Agaña River on Guam on June 11, 1900. The skin probably is in the Bernice P. Bishop Museum in Honolulu. =Anas oustaleti= Salvadori Marianas Mallard _Anas oustaleti_ Salvadori, Bull. British Ornith. Club, 4, 1894, p. 1. (Type locality, Mariannis Islands.)