FULVOUS TKEE-DUCK. 83 



Dendrocygna autumnalis (Linn.). Black-bellied Tree-duck. 



This tree duck comes into the United States in the lower Rio 

 Grande Valley and breeds as far north as Corpus Christi; it arrives 

 in April, the bulk leave in September and the last in November. It 

 ranges throughout most of Middle America from western Mexico 

 (Mazatlan) to Panama (River Truando); accidental in Jamaica. It win- 

 ters in Mexico at least as far north as central Vera Cruz (Vega del 

 Casadero) and Mazatlan. North of this district it is strictly migra- 

 tory, and throughout most, if not all, of its range in Central America 

 there seems to be a shifting of location between the winter and the 

 summer homes, but no data are available to determine the movements 

 with accuracy. 



Dendrocygna fulva (Gmel. ). Fulvous Tree-duck. 



Resident in southern Louisiana (Lake Catharine, The Rigolets, New 

 Orleans) and from Mexico north to central Texas (Galveston, North 

 Concho River), southern Arizona (Fort Whipple), central California, 

 and west central Nevada (Lake Washoe). In California the species has 

 been found breeding north to Los Banos in the San Joaquin Valley, 

 has been taken in winter in the Sacramento Valley (Marysville), 

 and has been noted probably as a straggler in Marin County (Inverness). 

 The breeding range in Mexico is from Lake Chapala, Lake Cuitzeo, and 

 the Valley of Mexico northward, while in winter the species passes 

 south to Guerrero and Chiapas. It has occurred in Lower California. 



An unusual case of wandering occurred in the fall of 1905. A flock 

 of ten was seen at Grays Harbor, Washington, on October 3, and 

 one was secured. A straggler was taken at Swan Island, North Caro- 

 lina, in July, 1886. 



The migration habits of the fulvous tree-duck are peculiar; one of 

 the most northern records (Marysville, Cal.) is of a winter specimen, 

 and almost the most southern (Lake Cuitzeo, Mexico) is of breeding 

 birds. While the species as a whole moves, north to breed and south 

 to winter — these movements occurring in April and October — a few 

 remain throughout the year in most of the range. 



The same species is found in South America, where it breeds com- 

 monly in the vicinity of Buenos Aires, and occurs thence north 

 through Uruguay and Rio Grande do Sul, Brazil, to central Paraguay 

 (Asuncion) and northern Argentina (Tucuman, Fortin Donovan). 

 Accidentals have been noted in central Chile (Paine), northern Peru 

 "(Moyobamba), northwestern Ecuador (Vinces), and east central Brazil 

 (Port Capuno, Rio Belmonte). Questionable records appear from 

 Venezuela and the Island of Trinidad. 



The migration habits of the fulvous tree-duck in South America are 

 the same as in North America; a few are resident at either extreme of 



