*All the images below were taken in Gill, Franklin Co., on April 3rd 2013 and digiscoped using a Panasonic Lumix FZ7 and Swarovski HD scope.
American Robins - North Cross Road. Typical scene from the first few days of April.
Many fields in Gill currently host such flocks.
Male American Robins - notice the 'sooty', blackish appearance and overall color of the bird above (T.m. nigrideus). This bird shows no contrast between the nape and the rest of the upperparts except for the rump which is contrastingly gray. The bird below (T.m. migratorious) it shows a fairly neat contrast between the black rear crown and gray mantle feathers, the mantle being only slightly darker than the rump. The blacker-mantled birds are distinctive and stand out in a loose feeding flock of robins.
T.m. nigrideus - All three images above refer to the same male on Munn's Ferry Road, April 3rd, 2013.
T.m. nigrideus - (male) right of shot with unidentified female at left and possibly another male nigrideus at the rear.
T.m. nigrideus - head, nape and mantle all relatively uniform blackish.
T.m. nigrideus - same bird as above. Most of the throat is blackish with only a small amount of white below the bill.
Compare with the bird below (T.m.migratorious or intergrade) which has a much more extensive white chin and throat.
T.m. migratorious or intergrade - two images of this male certainly show some blackish centered feathers in the mantle but the overall tone is still quite gray, not anywhere near as dark as the clearest examples of nigrideus. Assumed to be an intergrade between the two forms. Birds like this seem to be at least as frequent as the better examples of nigrideus in the flocks around Gill.