The SCISSOR-BILLS (Rhynchopes) constitute a group of night birds, bearing the same relationship to the Sea Swallows as the Owls to the Falcons. Their body is elongate, neck long, head small, wings very long, and the forked tail of moderate size. Their beak is so peculiar in its structure that it can be compared to nothing so happily as to a pair of scissors. The lower mandible is very considerably longer than the upper portion of the bill; the legs are feeble, tolerably long but slender, and the anterior toes connected by a deeply-incised web. The general plumage, which is close and smooth, presents a peculiar, greasy appearance.
THE INDIAN SCISSOR-BILL.
The INDIAN SCISSOR-BILL (Rhynchops orientalis) is white upon the forehead, face, tail, under side of the body, and upon the points of the larger wing-covers; the top of the head, back of neck, and mantle are blackish brown; the eyes are dark brown, the beak and feet coral-red. The length of this species is seventeen inches, its breadth forty-two inches, length of wing thirteen inches, and of tail two inches and a half. The Scissor-bill has frequently come under our notice, while travelling along the banks of the Middle and Upper Nile. This bird may occasionally be seen flying by day if it has been disturbed; but it usually remains motionless upon sandbanks from morning to evening, generally lying flat upon its belly, more rarely standing up on its little feeble feet; while thus reposing, it is but seldom that it makes any noise or exhibits the slightest activity. As the sun sets, however, it begins to be more lively, moves about, stretches itself, raises its wings, hops backwards and forwards, and utters its peculiar cry; but it is only as night approaches that it flies away in search of food. Its movements are then in exact accordance with the peculiar structure of its beak. With long strokes of its wings, it glides noiselessly along close to the water, from time to time dipping its lower mandible beneath the surface and keeping it there for a minute or two at a time, ploughing, as it were, the top of the river, with its strangely-shaped under jaw, and skimming the water. In this manner it manages to collect great numbers of the insects, which upon the banks of the Nile, at least, constitute its principal food. Whether it also eats small molluscs, more particularly bivalves, and is skilful in opening them with its beak, we cannot say, but that this is the case with some of its congeners seems to be pretty well established. Lesson states that he saw an American Scissor-bill seat itself quietly down near some bivalve shell-fish left by the tide and wait patiently till they opened their valves, when it inserted its beak between the separated shells, till the occupant again closed its valves and thus laid hold upon the beak; he then flew away with it to a neighbouring stone and beat the shell to pieces. Tschüdi relates the same circumstance, but whether from his own observation or from Lesson's narrative we do not know. At present we entertain some doubts of the accuracy of the observations alluded to. The flight of the Scissor-bill is light and beautiful, but somewhat peculiar, inasmuch as the bird is obliged to raise its wings very high in order to prevent the tips from[Pg 186] striking the water; its proportionately long neck enables it to do this, allowing it to keep its body at the distance of about an inch from the surface, while a considerable portion of its beak is held under water. Its hunting ground seems to extend for about the space of a mile up and down the stream. In Central Africa it will sometimes leave the river to hunt over some neighbouring pond. On the south and western parts of that continent it may possibly, like its American congeners, occasionally pay a visit to the coast. The cry of the Scissor-bills, which may sometimes be heard when they are passing about in company with each other is very peculiar, and entirely different from the cry of any other bird with which we are acquainted.
In the neighbourhood of Dongola we were fortunate enough to light upon one of their breeding-places. In the month of May we happened to see a number of these birds at their ease lying flat upon a large sandbank, which we were thus tempted to visit, and here to our great delight we found some of their nests. These latter consisted simply of excavations made in the sand; there was, however, this peculiarity about them, that each seemed to be the centre of a series of radiating lines that looked as if drawn with the back of a knife, and which obviously had been made by the birds, with their lower mandible. The eggs we found bore an extraordinary resemblance to those of the Sea Swallows. They were of an oval shape and in colour of a greenish grey, bordering on yellow, irregularly speckled with light and dark patches and streaks of grey and dark brown. In every nest we found five eggs. Whether both sexes brood or not we were unable to ascertain, neither could we obtain information as to the rearing of the nestlings.
Speaking of the young of the Indian species, Mr. Brooks writes to Jerdon:—"It was amusing to see an army of some hundreds of these little fellows (tortoiseshell-looking things) running steadily a couple of hundred yards before us. They run well, and when we reached the end of the sandbank, they attempted to swim off, while many squatted down; they did not make much way swimming, and sank very deep in the water."
The GULLS (Lari) form a well-defined and distinct family, recognisable by the following characters. Although these birds vary in size, from that of a Jackdaw to that of an Eagle, all are powerfully framed, with a short neck and large head. Their beak, which is of medium length, is strongly compressed at the sides, straight from the brow to the centre of culmen, and from that point to its apex bent gradually downwards, so as to form a strong terminal hook; both the upper and lower mandibles are provided with sharp cutting edges, and the gape extends backwards as far as the eyes; the tarsus is moderately high, but slender; the foot, with few exceptions, four-toed, the interior toes being webbed; the wings are long and broad, but acutely-pointed, the first quill being the longest; the tail, consisting of twelve feathers, of moderate length, is broad and straight, less frequently slightly incised; in a few species the centre feathers are somewhat prolonged. The general plumage, which is thick and soft, and fur-like on the under surface of the body, is very similarly coloured throughout the entire family. Upon the mantle and wings the prevalent hue is a beautiful blueish grey, varied with white and slate-black; the feathers of the under side (in many species the head and neck) are pure white; the back and feet of old birds are brighter and often of a different tint to those of the young. Gulls are to be met with in every quarter of the globe, but are most abundant in northern regions. A few species wander to a considerable distance from land, always, however, returning to the vicinity of the shore. All may therefore properly be called coast birds, and to the mariner they are always welcome, as sure harbingers of land. Their flights inland are even more frequent than their excursions into the open sea, and many of them may often be seen following the course of large rivers, or winging their way from lake to lake, into the interior of the country. Some species will frequently settle in the vicinity of inland lakes, and most of them prefer a similar situation as their[Pg 187] breeding-place. Many members of this family are more or less migratory; some appear upon our northern shores in the spring, and after rearing their young, take their departure in the autumn; others again only wander to considerable distances; there are, indeed, but few species that can be properly regarded as stationary. These wandering propensities are intimately connected with their supply of food. All of them live more or less upon fishes, but some also greedily devour insects, and these latter migrate with the greatest regularity. Besides the above articles of nourishment, Gulls eagerly pick up whatever small animals or animal substances they may happen to meet with. Carrion they devour as greedily as do the Vultures, even if it be in a putrid condition. In short, they appear to share the appetites of many other birds, and to be quite as omnivorous as the Crows. All Sea Gulls walk well and quickly; they swim buoyantly, lying in the water like so many air-bubbles, and dive with facility, but to no great depth, plunging probably for not more than one or two feet below the surface. Their voice consists of a harsh, disagreeable scream. As their breeding time approaches, these birds begin to assemble in flocks, which are frequently joined by other parties, until at last they form a numerous host. Even upon our own shores their nesting-places are often occupied by many hundred pairs, whilst further north they congregate in countless multitudes. The larger species crowd less closely together at these times than the smaller ones, the latter often literally covering the rocks on which their nests are so closely placed, that the brooding parents press upon each other. The structure of the nests varies in different localities; where grass and seaweeds are procurable they are carefully heaped together, but where these fail the nests are of still scantier proportions. The brood consists of from two to four comparatively large oval eggs, with strong coarse, brownish green or greenish brown shells, spotted with grey and brown; upon these both male and female sit by turns, for a period of three or four weeks. The young are clothed in a thick covering of speckled down, and shortly after emerging from the shell may be seen trotting about upon the sand, hiding themselves if alarmed behind little hillocks, or boldly plunging into the water. Such, however, as are born upon the ledges of perpendicular rocks, must necessarily remain there until their wings are strong enough to enable them to come down from their lofty perch, for they appear not to take the desperate leaps into the sea attempted by so many sea birds, to their destruction. During the first few days, the young are fed with half-digested food from their parents' crops, and afterwards with freshly-caught fishes, or other small animals. For some little time after they are able to fly they remain together, but soon quit their birthplace, and spread themselves along the coast. In the northern regions the Gulls are not only the most beautiful, but the most useful of the many feathered visitants; they are regarded as property, and as jealously preserved as any other game. In Norway the eggs form a very considerable part of the land proprietors' revenue. Among the poorer inhabitants the feathers are used instead of eider-down for bedding. The flesh of the old birds finds favour only amongst the Esquimaux, while that of the young is eaten by the inhabitants of Greenland and Iceland. If properly cooked, the latter, in truth, form by no means a despicable dish. Still, however, the eggs and feathers are looked upon as far more valuable than this somewhat fishy-flavoured game. In some localities, at certain seasons of the year, great battues are held, apparently much more from a love of slaughter than from any desire to turn the birds to account. The chase after Sea Gulls presents but few difficulties, a white pocket handkerchief thrown into the air is quite sufficient to attract their attention, and when they approach, if one is killed many others will at once crowd around it. They are also caught by a great variety of contrivances; snares are laid for them upon the sandbanks, some are caught in nets, and others by means of hooks, baited with fish.
The FISHING GULLS (Larus) comprise the larger members of the family, and constitute a well-marked section, principally distinguished by the colour of their plumage. All the members of this[Pg 188] group that we have selected for description are to be met with in northern climates between 60° and 70° latitude, where they breed upon the various cliffs and islands. Sometimes, indeed, they may be seen wandering inland, but, notwithstanding, all are sea-birds in the strictest sense. As regards their movements, they walk well, wade readily in the shallow water near the shore, swim lightly and buoyantly upon a rough sea, and often sleep upon the water. Their flight is slow, but by no means heavy, and can be sustained for a considerable time. With long strokes of their wings they sweep onwards through the air, sometimes flying in circles, sometimes mounting upwards against the wind, and again descend to the surface of the sea. In these flights they appear to be quite at their ease even during the wildest storms, and may frequently be seen plunging into the sea from a considerable height upon any prey that they may happen to espy. In sagacity and courage the Gulls are superior to their kindred, but they likewise surpass them in thieving and gluttony. They care little for the society of their brethren; nevertheless, it is a rare thing to see one of them alone. These Gulls subsist principally upon fishes of various size, and regard carrion, whether fish or flesh, as very delectable food; they also kill and devour small quadrupeds, and young or disabled birds. They rob the feebler sea-fowl of their eggs, and search upon the beach for worms and other animals. Should the shell of a crab or mussel be too hard for their beak, they at once fly with it into the air, and then, dropping it from a sufficient elevation upon the rocks beneath, shatter it to pieces.
THE GREAT BLACK-BACKED GULL.