. The Canadian field-naturalist. July-Sept., 1953] The Canadian Field-Naturalist 105. Map o* the southwest corner of the Saint Elios quadrangle. The map shows the Alaska Highway, the Heine's Road, and localities mentioned in the paper. For the most part along the Canol Road bird Ufe was scarce in regard to both species and indi- viduals. This, too, was the experience of Bishop (1900, p. 49) who wrote '....The Yukon Valley seems wanting in bird Ufe — not the center of abundance of its avifauna, but rather a deposit for the overflow from more favoured regions. There are exceptions to this rule,
. The Canadian field-naturalist. July-Sept., 1953] The Canadian Field-Naturalist 105. Map o* the southwest corner of the Saint Elios quadrangle. The map shows the Alaska Highway, the Heine's Road, and localities mentioned in the paper. For the most part along the Canol Road bird Ufe was scarce in regard to both species and indi- viduals. This, too, was the experience of Bishop (1900, p. 49) who wrote '....The Yukon Valley seems wanting in bird Ufe — not the center of abundance of its avifauna, but rather a deposit for the overflow from more favoured regions. There are exceptions to this rule, notably wandering flocks of crossbills, the colonies of bank swallows of Fiftymile and Thirtymile rivers and the Yukon proper, the spotted sandpipers that continually flitted across our bow, the intermediate ( = white- crowned) sparrows and juncos that seldom failed to greet us as we stepped ashore, and the Alma ( = Swainson) thrushes whose songs sounded all night wherever we happened to camp. Bird life is fairly abundant, too, in certain favoured places such as Log Cabin, Caribou Crossing, the swampy shores of Lake Marsh, and the ponds and level country at the lower end of Lake Laberge .... In the entire Upp>er Yukon Valley breeding colonies of shore and water birds were conspicuously absent.' On the Canol Road, too, there were occasional exceptions to this scarcity, as about the marshy lakes in the Pelly River Valley where in the willow and alder thickets were many yellow and orange- crowned warblers, fox and white-crowned sparrows, and alder flycatchers, nearby lesser yellow-legs, short-billed and Bonaparte gulls, and rusty black- birds were common, and on the marshy lakes were many horned grebes, mallard, green-winged teal, pintail, baldpate, shoveller, and lesser ; It seems there may be at least two explana- toins for these impressions: 1) If you travel the rivers in middle June when the birds. Please note that these images are extracted from scanned page i
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