. [Collected reprints, 1911-1931. Ornithology; Mammals. 1926] Swarth: Birds and Mammals from the Atlin Region 89 Labrador birds are much more grayish than are those from Alaska. Thus the Labrador willoW ptarmigan {ungmvus) and the British Columbia bird {ailbus) are much alike as regards color but differ in size of bill. The Labrador bird and the northern Alaskan bird {cHoiscensis) are both large-billed forms, but differ in coloration. As regards the ranges of the several North American subspecies of Lagopus lagop^is, it is not feasible at this time to indicate them with exactness. Series of bi

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. [Collected reprints, 1911-1931. Ornithology; Mammals. 1926] Swarth: Birds and Mammals from the Atlin Region 89 Labrador birds are much more grayish than are those from Alaska. Thus the Labrador willoW ptarmigan {ungmvus) and the British Columbia bird {ailbus) are much alike as regards color but differ in size of bill. The Labrador bird and the northern Alaskan bird {cHoiscensis) are both large-billed forms, but differ in coloration. As regards the ranges of the several North American subspecies of Lagopus lagop^is, it is not feasible at this time to indicate them with exactness. Series of birds from the Kowak River, Alaska, and from points on the Yukon as far upstream as Forty-mile, Yukon Territory,. 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 Swarth, Harry Schelwald, 1878-. s. l. , s. n.

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