. Bulletin. Natural history; Natuurlijke historie. DISCUSSION 151 or to have swung around the bay from the Forillon. In other words, they were migrating in a coastal fly-hne rather than a broad front. Courses A and D are as yet unrepresented in the records. It may be pointed out that should birds follow D, they would be flying in the same direction as were those thrushes heard ascending Fox River. Since thrushes breed all about the Gulf of St. Lawrence, and within it upon Anticosti and the Magdalens, one may envision a general north and south migration across the gulf. On the other hand, there
. Bulletin. Natural history; Natuurlijke historie. DISCUSSION 151 or to have swung around the bay from the Forillon. In other words, they were migrating in a coastal fly-hne rather than a broad front. Courses A and D are as yet unrepresented in the records. It may be pointed out that should birds follow D, they would be flying in the same direction as were those thrushes heard ascending Fox River. Since thrushes breed all about the Gulf of St. Lawrence, and within it upon Anticosti and the Magdalens, one may envision a general north and south migration across the gulf. On the other hand, there may be a hne through Newfoundland between Labrador and Cape Breton, and another through eastern Gaspe and Anticosti to the north shore of the gulf. The. Figure 25. Diagram of theoretical flight courses across the St. Lawrence River to Gaspe. former is suggested by the statement (Macoun, 1909, p. 741) that the olive-back is a "tolerably common summer migrant in ; That a fly-line through Gaspe to Anticosti exists seems doubtful because, 1) ob- servations of such a movement are lacking on the Forillon, 2) most of the island lies northeast of Gaspe, and 3) the species breeds on the Magdalens. Studies conducted on these little islands in the center of the gulf are needed to determine whether considerable numbers of thrushes migrate through them. Few who write of the migration, homing, and orientation of birds can resist a statement concerning those that each season reach their island territories. Racial and individual memory, homing instinct, sense of direc- tion, response to the earth's magnetic field, random wandering with recogni-. 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 Peabody Museum of Natural History. New Haven : The Museum
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