Southerly
Ad. & in winter .-Sides of the front of the head washed with grayish brown; sides of the back of the head and sides of the upper neck black, more or less margined with ochraceous; rest of the head, neck all around, upper back, scapulars, and lower belly white; back, breast, and upper belly black; tail pointed, the middle feathers very long and narrow; band across the end of the bill yellowish orange. Ad. & in summer.-Sides of the front of the head white; crest of the head, neck, throat, breast, and upper belly black; back and scapulars black, the latter margined with dark buffy ochraceous; lower belly white; tail and bill as in the preceding.in winter.-Upper parts black or fuscous; scapulars and upper back more or less margined with grayish or grayish brown; sides of the head and neck and sometimes the back of the neck white or whitish; breast grayish; belly white; tail pointed, but without the long feathers of the male; under wingcoverts dark. Ad. 2 in summer. - Generally similar to the above, but the sides of the head and throat mostly blackish, and the feathers of the upper parts more or less margined with ochraceous. L., 8, 21.00, 2, 16.00; W., 8.60; T., 8, 8.00, 2, 2.50; B., 1.05.