.--On 6 May 1962 I watched a Cattle Egret (Bubulcus ibis) swallow an adult male Blackpoll Warbler (Dendroica striata) at Garden Key, Fort Jefferson National Monument, Dry Tortugas, Florida. The cap- ture of the warbler was observed, shortly before my arrival, by some of my com- panions. Immediately after the swallowing of the warbler the egret began stalking another male Blackpoll Warbler resting on the beach nearby. When the egret was about four feet away, the warbler escaped by flying weakly to a nearby bush. On 5 January 1963 I saw a Cattle Egret eating a Myrtle Warbler (Dendroica coro- nata) in a mowed field in front of the Flamingo Visitors' Center, Everglades National Park, Florida. Swallowing was hindered by eight other Cattle Egrets, which constantly pursued the egret which had the warbler. The feet and tail of the warbler protruded from the bill of the egret. When the warbler xvas disgorged and dropped to the ground, the other Cattle Egrets rushed toxvard it. The first egret then picked up the warbler to resume swallowing it. The other egrets then dispersed and resumed inscct hunting. Approximately 300 Myrtle Warblers were feeding on the ground among the Cattle Egrets. The only other instance of avian predation by the Cattle Egret of which I am aware was that observed by Alexander Sprunt IV (R. S. Palmer [ed.], Handbook of North American birds, vol. 1, New Haven, Connecticut, Yale Univ. Press, 1962; see p. 448), who saw a Myrtle Warbler swallowed by a Cattle Egret at Clewiston, Florida, 3 Febru- ary 1958. Palmer (op. cit.) gives no records of predation by Cattle Egrets on birds in the old world. Apparently this seldom or never occurs, as investigation of such ap- propriate general and regional sources as Baker, Bannerman, Mackxvorth-Praed and Grant on Africa, and Witherby et al. (Handbook of British birds, London, Witherby, 1938-1941), fail to reveal any records of predation on birds by the Cattle Egret. McLachlan and Liversidge (in A. Roberts, The birds of South Africa, Cape Town, Cape Times Ltd., 1957; see p. 61) list "young birds" as food items for the Cattle Egret, but do not indicate species or frequency of consumption. Predation by the Cattle Egret on birds may occur elsewhere, perhaps more fre- quently than presently known, but it seems highly possible to me that Cattle Egrets may have been conditioned to this habit in the Dry Tortugas due to the scarcity of insect food there. At these remote islands I have found four dead and three dying Cattle Egrets, plus dead passerine birds of several species, presumably the results of exhaustion or starvation or both. The Tortugas are much used as a resting area for migrant birds, including Cattle Egrets. The small numbers of insects present are gleaned by the many passing migrants. Many small passefine birds are found on the ground, exhausted, and afford easy prey. Killing of healthy birds could even result from experience gained by feeding upon dead or dying birds lying on the ground. Other ornithologists who visited the Dry Tortugas in May and June, 1962, also ob- served small birds being eaten by Cattle Egrets. Dr. William B. Robertson, Jr. (pers. comm.), observed Cattle Egrets soaking warblers in fresh water before swallowing them.--Rm^m) L. CJc^, Everglades National Park, Flamingo, Florida.