But it is its final actions that impress the beholder with wonder and admiration. The hitherto trailing wings now assume a condition of rigidity, and commence a firm, but slow, downward and forward movement, which steadily increases in power and rapidity, until the swiftly-vibrating wings appear only as a semi-circular outline of mist above the bird, thus giving rise to a sound which may be appropriately likened to the reverberations of distant, muttering thunder. These sounds are most generally heard during the cool hours of the morning, when the spirits are buoyant after a night of refreshing slumber. But as the day advances, they are less frequent, and irregular. So nicely can they be imitated, that many a bird is drawn to his doom, when advancing to meet a supposed antagonist.
As the drumming of the Ruffed Grouse is as often heard in fall as in spring, it has long been a mooted question as to its significancy as the call-note of the male during the breeding-period. But there cannot be the least doubt of the correctness of this interpretation, for we have the most incontestable proof of it in the responsive actions of the female. Nuttall is probably correct in ascribing the autumnal exhibition of the same wonderful power to self-gratification, and in affirming it to be, in many instances, "an instinctive expression of hilarity and vigor."
Besides the peculiar drumming sound which the males produce during the love-season, they give expression to vocal utterances which are no less remarkable. These are generally given forth when about to arise from the ground, and consist of two well-defined and characteristic notes. The first may be described as a sort of cackle, repeated several times in lively succession. The other, which closely follows in its wake, is a peculiar lisping whistle, which has not inaptly been compared to the cry of a young bird. These notes doubtless play a part in the reconcilement and bringing together of the sexes after their temporary separation.
While the courting-season continues, it is not an uncommon occurrence to find a single male in the midst of several females, before whom he is engaged in showing off his many good qualities and graces. In such a dilemma, it is no easy matter to make a selection. Enamored by so many, he is sometimes disposed to be gay and trifling, and to dally with the affections of some pure and simple-minded female. Thus we often find him carrying on the most cruel flirtations. But when he does bring himself earnestly down to the business of choosing a partner, he does not go about it in an uncertain, hesitating manner, but makes his selection with promptness and dispatch. The successful female, proud of the honor conferred, at the call of her lord, forsakes the group of unmarried sisters, and follows him wherever he listeth. The warmest tokens of affection and regard are lavished upon her, and woe to the rival who should appear upon the scene while these amours are being enacted. Should such an event come to pass, the intruder is at once assailed, and a long and bloody encounter ensues, which results in the death of one or other of the combatants, but never in the complete vanquishment of the defensive party. Instances are known where males have treated their first choice with cruel indifference, and ultimately deserted them. Such things could not otherwise be when the question of polygamy comes to be considered, for it is a fact that both birds are slightly promiscuous in their intercourse, although the tendency is more marked upon the part of the male.