. The Canadian field-naturalist. Natural history. Z 260 270 280 290 300 310 320 White-winged Scoter. 260 270 280 290 300 310 320 Day of Year (1 = 1 Jan) Figure 3. The numbers of scoters seen at Confederation Bridge from Cape Jourimain, New Brunswick, 17 September (day 260) to 20 November (day 322) 1997. In New Brunswick, all three species were first encountered on 18-20 September and Surf and Black scoters were still present on the last day of observa- tion (18 November); the last White-winged Scoters (2) were seen on 6 November (Table 4). Of the total numbers of scoters seen over the 28 days
. The Canadian field-naturalist. Natural history. Z 260 270 280 290 300 310 320 White-winged Scoter. 260 270 280 290 300 310 320 Day of Year (1 = 1 Jan) Figure 3. The numbers of scoters seen at Confederation Bridge from Cape Jourimain, New Brunswick, 17 September (day 260) to 20 November (day 322) 1997. In New Brunswick, all three species were first encountered on 18-20 September and Surf and Black scoters were still present on the last day of observa- tion (18 November); the last White-winged Scoters (2) were seen on 6 November (Table 4). Of the total numbers of scoters seen over the 28 days of observa- tions at Cape Jourimain, the percentages of the three species seen were Surfs, Blacks, White-winged while remained unidentified. The rates of movement (number of scoters seen per hour) on the New Brunswick side of the Strait ranged from a peak of on 11 October to on 13 November (Table 4). From Borden, the rates of movement ranged from on 20 October to on 3 and 4 November (Table 6). Based on the daily total numbers of birds seen at Cape Jourimain, the migration of scoters through the Northumberland Strait peaked in early to mid- October, between 6 and 20 October (Table 4). Peaks of White-winged Scoters remain unclear, possibly 17-25 October, and Black Scoters peaked later, around 26 October to 3 November (Table 4). Hence, based on those birds identified by the observers. Surf Scoters reached Confederation Bridge in early October, White-winged Scoters in mid-October and Black Scoters in late October-early November (Figure 3). On the Prince Edward Island side, the largest numbers of scoters were seen on 22-28 October, slightly later than when peak numbers were recorded in New Brunswick, although most could not be identified to species (see Table 6). Of all three species of scoters which were identi- fied from Cape Jourimain in October and November, Surf Scoters were clearly the predominant species using the Northumb
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