. The Canadian field-naturalist. 538 The Canadian Field-Naturalist Vol. 104 It is possible that birds in the Rainier colony of Alberta originated from the western breeding range while those in the Cassils colony are in the eastern range. Alternatively, the Rainier juvenile may simply have taken a different route than normal, perhaps in the company of some western birds. Black-crowned Night-Herons will migrate singly (Cramp and Simmons 1977) or in small to large flocks (Palmer 1962; Cramp and Simmons 1977). Spring and Summer Distribution (Site Tenacity) Of birds banded in Ontario and Quebec, th
. The Canadian field-naturalist. 538 The Canadian Field-Naturalist Vol. 104 It is possible that birds in the Rainier colony of Alberta originated from the western breeding range while those in the Cassils colony are in the eastern range. Alternatively, the Rainier juvenile may simply have taken a different route than normal, perhaps in the company of some western birds. Black-crowned Night-Herons will migrate singly (Cramp and Simmons 1977) or in small to large flocks (Palmer 1962; Cramp and Simmons 1977). Spring and Summer Distribution (Site Tenacity) Of birds banded in Ontario and Quebec, there were 19 recoveries of adults during April through August, 1942-1986 (Figure 4). Thirteen recoveries in Ontario and Quebec were of birds recovered in the same province where they had been banded as chicks. Two recoveries occurred in the same 10' banding block. Six recoveries were within 20 km of the original banding location (including the two within the same banding block) while 12 occurred from 90 to 800 km (x = 190 km) of the banding location. In addition, one recovery from Cuba, not fitting this. Birds which wore B. Birds which were banded in the banded in Ontario Prairie Provinces. or Quebec. O Adults N - 1 ⢠Adults N = 19 D Yearlings N = 0 â Yearlings N = 8 ^ Locations where adults and yearlings were ^ recovered in the same 10' block. 1a indicates one recovery of an adult, 2y indicates two recoveries of yearlings. FiouRi: 4. Band recoveries of Black-crowned Night- Herons during April-August, 1942-1986. .Juve- niles (N = 0, Prairie Provinces; N = 13, Ontario and Quebec) are not plotted. See text. A symbol with the letter "L" indicates that the only date available was the date of the letter reporting this recovery. See methods and materials. pattern (> 2000 km from the banding location), consisted of a report of only the band or band number and the only date available was the date of the letter reporting the recovery. There were eight recoveries of
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