. The Canadian field-naturalist. • PIGEON GUILLEMOT NESTS 1957-60 -^LOW WATER MARK ^77 NESTS ^44 NESTS % DOUBLE-CRESTED CORMORANT SUBCOLOMES 1960 SONG SPARROW TERRITORIES 1961. o ^ UNMATED ^ MALE PELAGIC CORMORANT CENSUS OF OCCUPIED NESTS 1959 SONG SPARROW TERRITORIES 1-7 MAY 1962. 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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