. Bulletin of the British Ornithologists' Club. No. 1. First year transition drake, , showing white neck ring, crescents of upper breasts, barring and spotting of lower No. 2. First year transition drake, , showing pale chin spot, crescents of upper breast and apparent absence of spotting on lower 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 Taylor, Nancy M. Oxford : Clarendon Press

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