_Field marks._--In its nuptial plumage the red phalarope can be easily recognized by its brilliant colors; the male is smaller, his colors are duller, and his breast is mixed with white. In its winter plumage, in which we usually see it, it is likely to be confused with the northern phalarope or the sanderling. It is larger than the former, more stockily built and has a shorter, thicker bill, which is yellowish at the base. From the sanderling it can be distinguished by the gray markings on the head and neck, which are mainly white in winter sanderlings, by the darker gray of the back and by the yellow at the base of the bill. Phalaropes are usually tame enough to allow close study of these details. John T. Nichols suggests to me the following additional field characters: This phalarope holds its gray plumage well into the spring and adults quickly resume same when they go to sea in late summer. Around the first of August flocks offshore are in gray and white "winter" plumage, but a few birds have a peculiar pink tone appreciable on the underparts at fair range, apt to be strongest posteriorly, and which is diagnostic. It is caused by scattered old red feathers overlaid by the delicate tips of new white ones. The white wing stripe is somewhat broader in this than in the northern phalarope and in gray plumage the upper parts are of so pale a tone that the wing pattern appears faint, something as it does in the piping plover. What seems to be a late summer plumage of birds of the year, on the other hand, is less white than the corresponding one of the northern. As the bird sits on the water the sides of its neck, breast, and sides appear brownish (not red or pink), the only touch of whitish it shows is on the flanks. At close range a curved phalarope mark behind the eye is just indicated, corresponding to the bold contrasting mark in the northern. _Enemies._--Phalaropes are not considered game birds, as they are too small and too seldom seen in large numbers to warrant pursuing them; so man should not be counted among their enemies. On their Arctic breeding grounds they evidently have plenty of avian enemies, such as jaegers, gulls, and various gyrfalcons. Mr. Manniche (1910) writes: