. The Canadian field-naturalist. . Figure 4. One of the main breeding concentrations, seen from the adjacent cHff top. We counted Northern Fulmars on the north and northeast walls and on 'island spur' on 23, 24 and 25 July and estimated other areas by extrapolation. Many of the Northern Fulmars observed were extremely dark in color, looking similar in shade to Sooty Shearwaters, Puffinus griseus (equivalent to the DD phase of Van Franeker and Wattel (1982)). These birds were very difficult to pick out against the blackish basalt of the clifs. Furthermore, many breeding sites were in crevices o
. The Canadian field-naturalist. . Figure 4. One of the main breeding concentrations, seen from the adjacent cHff top. We counted Northern Fulmars on the north and northeast walls and on 'island spur' on 23, 24 and 25 July and estimated other areas by extrapolation. Many of the Northern Fulmars observed were extremely dark in color, looking similar in shade to Sooty Shearwaters, Puffinus griseus (equivalent to the DD phase of Van Franeker and Wattel (1982)). These birds were very difficult to pick out against the blackish basalt of the clifs. Furthermore, many breeding sites were in crevices or under overhangs which made them hard to see. Consequently, we believe that our counts considerably underestimated the number of fulmars present. Based on our counts, we estimated that 10 150. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ottawa Field-Naturalists' Club. Ottawa, Ottawa Field-Naturalists' Club
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