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 suspended or reversed by the bird that has been separated getting up to the other two, when one of these will often fall behind, so that now the bird which was the follower makes one of the two advanced ones, whilst one of these has taken its place. As there is no sexual distinction in the plumage of peewits, it is impossible to be quite sure to what sex each of these birds belongs, but I believe that two of them are male and female, and the third a male, either of the two males being alternately in the close company of the female. This, indeed, may be in the nature of the matter. The pairing off of the birds, we will suppose—as is likely at this time—is not yet completed, and, assuming two of the three to be of one sex, it may not be quite settled with which of them the third will pair. It is not, indeed, necessary to suppose that either of the three will eventually pair with one of the others, though this may be probable. But what appears to me to obtain is this, that the association of two birds (male and female) together has a tendency to bring up a third, presumably a male, who envies this arrangement, and would fain itself make one of the two. But how, then, is the amicableness—or, at any rate, the absence of any marked evidence of hostility—to be accounted for? I believe that at this early season the sexual feelings have not yet become fully developed, or so strong as to produce jealousy to any active extent. Things are only beginning, the emotions are, as yet, in their infancy, and thus, I believe, the curious, not fully defined nature of the actions of the three birds—their seeming to be half unconscious of what they