It is very remarkable, that these birds which generally pass northward in May, and require only three months for incubation and growth of young, live the other nine months apparently in comparative idleness at the south. This peculiarity has led to the suggestion that they may travel to the Antarctic ocean during their absence from the north—which, although probable, is as yet, from our entire ignorance of their habits, a mere suggestion.
During the northward flight in May, there is often good sport, but the time is more uncertain than in August; nor do the birds, which are old and wary, stool quite so well as on their return. In the spring they pursue the same course as in the autumnal flight; which, although it is the most direct line, and follows the principal expanse of salt meadow, necessitates considerable journeys far out at sea. But it is doubtless the fact that these birds, in consequence of their stretch and power of wing, could sustain an unbroken flight from north to south, and accomplish the distance in a wonderfully short space of time. Unabated speed of one hundred miles an hour is equivalent to twenty-four hundred miles in a day, and portions of the flock may not pause between Labrador and the swamps of Florida.
When the wind is strong and continuous from the westward, it is supposed that they pass far out to sea; and during these seasons there will be no flight of birds either at Long Island or on the Jersey coast. At such periods sportsmen often conclude that the entire race has been destroyed, till the easterly winds and soaking rains of the following year, bring them back more numerous than ever. As they must migrate, and are not to be found anywhere on the land, it is clear that they must have the power of completing their journey in one unbroken flight.
The principal varieties are the sickle-bill, jack-curlew, the marlin and ring-tailed marlin, the willet, the black-breast or bull-head, and golden plovers, the yelper, yellow-legs, robin-snipe, dowitchers, brant-bird, and krieker. The upland or grass-plover is pursued in a different manner, and the smaller birds are not pursued for sport at all.
The sickle-bills, so named after the beautiful sweeping curve of the bill, which has been known to measure eleven inches in length, are the largest of them all. They are colored much like a marlin, have a beautiful bright eye, a short reed-like call, and a steady, dignified flight. In stretch of wings they exceed three feet, and nothing can be more impressive than the approach of a large flock of these birds with wings and bills extended and legs dropped in preparation for alighting amid the stools.
They are often shy in the first instance, but as soon as one of their number is killed, they return again and again to the fatal spot—apparently in blind confidence that he must have alighted instead of fallen, or out of brotherly anxiety for his fate. I have on several occasions attracted a large flock that was hesitating whether to approach or not, and almost resolving to depart, by killing one of their number that incautiously ventured within long range—for immediately on seeing him fall, they approached, in spite of the report, with full confidence.
They are easily killed, by reason of their moderate speed and customary steadiness, although they can dart rapidly when alarmed, and will often, like all the bay-birds, carry off much shot. Their flesh is tough, very dark, and scarcely fit for the table, except perhaps when they first come on from feeding on the more dainty repasts famished by the uplands of Labrador.
The jack-curlew is a still more wary bird, and although he comes to the stools, rarely pauses over them, and never returns after being once fired at. He is seldom seen in large flocks, and flies rapidly and steadily. His cry is longer than that of the sickle-bill, and, like it, easy to imitate. From his wariness and rarity he is regarded as the greatest prize of the sportsman, although his flesh is little better than that of the sickle-bill.
The marlin is quite common, very gentle, stools admirably, and goes in large flocks. In color it is similar to the sickle-bill, but it is much smaller and has a straight, if not slightly recurved, bill. It is attracted by the same call, and is equally tough and sedgy as food. The ring-tailed marlin differs from it entirely in color, resembling a willet—except that its wings are darker, and its tail black with a white ring—but it has the long, straight, marlin bill. It is a rare bird, seldom collects in large flocks, and is often fat and tolerable eating. It does not stool as well as its plainer brother, but from its scarcity and higher gastronomic claims, it is more highly prized.
The willet is greyish in general color, with a white belly and broad bands of black and white across its wings. It has a loud, shrill shriek, stools well, flies steadily, congregates in large flocks, and when fat is quite eatable. It often associates with marlins and sickle-bills, where its light colors make a beautiful contrast.