. The Canadian field-naturalist. Natural history. 2001 Lien, Nelson, and Hai: Status of White-beaked Dolphin in Canada 119. Figure 1. White-beaked dolphin {Lagenorhynchus albirostris). Drawn by Dawn Nelson. pers and fluke are black. There is considerable varia- tion in colouration among individuals (Reeves et al. 1996*), some of which may be attributable to age (Jonsgard 1962; Mercer 1973; Corbet and Southern 1977; DeBoer 1989). Distribution The White-beaked Dolphin is found only in cold temperate and subarctic waters of the north Atlantic (Leatherwood and Reeves 1983; Katona et al. 1993); it
. The Canadian field-naturalist. Natural history. 2001 Lien, Nelson, and Hai: Status of White-beaked Dolphin in Canada 119. Figure 1. White-beaked dolphin {Lagenorhynchus albirostris). Drawn by Dawn Nelson. pers and fluke are black. There is considerable varia- tion in colouration among individuals (Reeves et al. 1996*), some of which may be attributable to age (Jonsgard 1962; Mercer 1973; Corbet and Southern 1977; DeBoer 1989). Distribution The White-beaked Dolphin is found only in cold temperate and subarctic waters of the north Atlantic (Leatherwood and Reeves 1983; Katona et al. 1993); it appears more common in eastern than western waters. In the northwest Atlantic (Figure 2), Lagen- orhynchus albirostris occurs from eastern Greenland (Jonsgard 1962; Jonsgard and Christensen 1968; Christensen 1972; Benjaminsen et al. 1976), through the Davis Strait and south to Massachusetts (Mercer 1973; Leatherwood et al. 1976; Leatherwood and Reeves 1983; Boles 1980*; Winn and Edel 1980; Ailing and Whitehead 1987). In the east, the species has been observed off Iceland (Mercer 1973; Andresson 1978), the Norwegian Sea (Haug et al. 1981; Leatherwood and Reeves 1983; 0ritsland et al. 1989), the Barents Sea (Christensen 1972; Ben- jaminsen et al. 1976; Leatherwood and Reeves 1983), occasionally in the Baltic Sea (Aguayo 1978; Leatherwood and Reeves 1983), and in the North Sea, including waters near Denmark, the Nether- lands, England, and Scotland (Husson and Van Bree 1976; Corbet and Southern 1977; Evans 1980; Leatherwood and Reeves 1983; McBrearty et al. 1986; Baptist 1987; Smeenk 1989; Bakker and Smeenk 1990; Northridge et al. 1995). It is more rarely observed in the Irish sea (Evans 1980; Egan 1984; Jones 1984). There is some evidence to suggest that Lagenor- hynchus albirostris may be extending its range south in the eastern, but not in the western, Atlantic. Sightings south of 55 degrees latitude appear to have become more common in recent years. White- beaked Dolphins were
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