. Bulletin of the British Ornithologists' Club. Birds. D. N. Carstairs 167 1989 109(3) *>fc 5tf oo 2, SEDGE ISUtiD SP 30' STMTS ISL<«&# 52*00'. 51* so' a' qq' aiomTics Figure 1. Falkland Islands showing principal areas visited O and Rufous-chested Dotterel Zonibyx modestus locations • 1972-1974. grass (Cortaderia sp.), ferns and the heath-like shrub, Diddle Dee Empetrum rubrum. On the South American continent, the species breeds in the west along the sea-board of Chile, ranging for over 3000 km from 40°S to Cape Horn, 56°S; and in Argentina in the east, in Tierra del Fueg
. Bulletin of the British Ornithologists' Club. Birds. D. N. Carstairs 167 1989 109(3) *>fc 5tf oo 2, SEDGE ISUtiD SP 30' STMTS ISL<«&# 52*00'. 51* so' a' qq' aiomTics Figure 1. Falkland Islands showing principal areas visited O and Rufous-chested Dotterel Zonibyx modestus locations • 1972-1974. grass (Cortaderia sp.), ferns and the heath-like shrub, Diddle Dee Empetrum rubrum. On the South American continent, the species breeds in the west along the sea-board of Chile, ranging for over 3000 km from 40°S to Cape Horn, 56°S; and in Argentina in the east, in Tierra del Fuego and the Magellanic Islands, moving northwards in winter to Uruguay and, rarely, as far as Sao Paulo, Brazil (23°S). In the west, the wintering range extends from Valdivia (40°S) to Atacama (24°S) (Meyer de Schauensee 1971). In the Falkland Islands, over 500 km east of mainland South America, there has always been some conjecture about the status of Z. modestus. Abbott (1861) was certain enough to consider it "a migratory bird in East Falkland" and further believed that birds "disappeared entirely" by the end of April each year. Bennett (1926) was less certain, and while agreeing that it was a "common summer migrant and breeding", he considered that "a few remain throughout the winter". This view was shared by Cawkell & Hamilton (1961), citing pre-migratory build ups on west Falkland and visible migration over Stanley in East Falkland. Pettingill (1960) however, thought it unlikely that this species (or any other) regu- larly left the Falklands against the strong prevailing westerly winds. Woods (1975) believed that more birds were present during the winter than had been thought but that their dowdier plumage and inconspicuous behaviour at that time made them more difficult to see. Fieldwork I was resident in the Falkland Islands from January 1972 to December 1974, during which time I made 369 field trips throughout the count
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