THE SURINAM FINFOOT, OR PICAPARE.
The SURINAM FINFOOT, or PICAPARE (Heliornis Surinamensis), has the head and upper neck black; the back, wings, and tail are brown; a stripe over the eye, the throat and front of neck are white; the breast and belly yellowish white. The eye is brown, beak pale greyish yellow with brown base and black point; in old birds the bill has a red shade. The feet are yellowish red, the inner and hinder parts of the tarsus black, and the toes marked with a black band over every joint. The length of this bird is twelve inches, breadth sixteen inches, length of wing five and a half inches, and tail three and one-sixth inches. According to observations made by the Prince von Wied, the Picapare is to be met with in Brazil and Paraguay, its habitat extending to 25° south latitude, so that it may be said to occur throughout a considerable part of South America. It is by no means scarce upon the rivers of East Brazil, but is often overlooked, as it hides itself amongst the luxuriant vegetation that covers the shore; wherever darkness and silence favour its presence, it is always to be found. Very frequently it may be seen sitting on a thin branch, partially immersed in the water, and occupied in bowing its head in a most peculiar manner. Its food consists of aquatic insects and seeds, in search of which it occasionally plunges its head under water. Its voice, which is emitted from the[Pg 113] throat, somewhat resembles the barking of a little dog. We learn from the same authority that the young of these birds are only two in number, and are reared during the hot season. At first they are nearly naked, and hide themselves under the wings of their parents, holding themselves on by means of their beaks; when they have grown a little stronger, they may be seen sitting upon their mother's back, and even accompanying her in her dives under water. If alarmed when with its young, the Picapare at once takes wing, and betakes itself to the shelter of the thick bushes that cover the shore; if still further pressed it hides among rushes and reeds until the danger is passed. It seems only to dive when seriously alarmed, as for example, when shot at; on such occasions it will remain under water for a considerable space of time; its powers of diving, however, are far inferior to those of many water birds.
THE STILT BIRD (Charadrius himantopus).
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THE SWIMMERS (Natatores).
BUT little difference of opinion exists among naturalists as to the limits of our last order; indeed, a swimming bird is at once recognisable by characters so sharply defined that there is scarcely room for doubt or hesitation. The grand character whereby they are all distinguishable is to be found in the structure of their feet, the toes of which are more or less completely united to each other by a broad web by which they are converted into paddles, admirably adapted to propel them through their appropriate element. Hence they swim with facility, and frequent rivers, lakes, and seas. Generally speaking, the Natatores move awkwardly on land, as, in order to render the strokes of their paddle-like feet more effective, their legs are placed more or less behind the centre of gravity, so that when on the ground they have, in a great measure, to retain their balance by muscular exertion, as may be seen in the Goose or Swan as they waddle clumsily over the grass. In some cases these birds are compelled to assume an upright attitude, as do the Auks and Penguins. In the structure of the feet important differences are observable, generally only the three front toes are connected together by the web, but occasionally the hind toe is likewise included in the expansion of the skin, or is provided with lateral appendages that materially enlarge its surface. The form of the body in the swimming birds is boat-like; in those that dive, the ribs are strong and carried back, so as to almost entirely surround the enclosed viscera, and thus defend them from undue pressure. Their plumage is dense, close, and waterproof, consisting of a thick under garment of down overlaid with broad flat feathers, which throw off the water as if their surface were oiled. In many groups the neck is very long and the tail very short, while in others the tail composed of rigid quills is employed as a rudder when the birds are diving. Some are utterly incapable of flight, and use their wings in the water as though they were fins. The members of this order live almost exclusively upon animal food, only a few preferring a vegetable diet. All, without exception, are sociable in their habits; most of them exceedingly prolific, some species, however, lay but one egg. Frequently they crowd their favourite breeding-places in great numbers, and are devotedly attached to their offspring; some will even incubate eggs, and rear young that are not their own.
THE SIEVE BEAKS.
The SIEVE BEAKS (Lamellirostres), according to our usual plan, are placed at the head of the Natatorial order, as in these TOOTH-BILLED and SOFT-BILLED SWIMMERS, as they have been called by various writers, the peculiar attributes of Swimming Birds are most equally developed, and their locomotive capabilities most varied. Whoever examines a Duck with attention, will appreciate the leading features whereby the Lamellirostres are distinguished. Their bill is generally depressed, broad, and always laminated at the sides; the lamination being more prominent in some species than in others, but always so arranged as to form a sieve-like apparatus, by means of which these birds obtain their food, in a manner peculiar to themselves. This remarkably constructed beak, which is seldom longer than the head, is usually straight, broad, and flatly arched above, terminating in front in a broad nail-like appendage, while at the sides it presents a series of horny laminæ, which interlock with similar developments from the under jaw. With the exception of the margins, which are tolerably hard, the entire beak is covered with a soft skin, and is largely supplied with branches of the fifth pair of nerves,[Pg 115] so as evidently to be endowed with great sensibility, as is likewise the tongue, which is large and fleshy except at its sides, which are fringed and toothed with horny ridges. When we observe the use that the Duck makes of this organ, we perceive that, unlike other birds, it discriminates its food, not by sight or smell, but by the sense of touch resident in its tongue. It plunges its beak into the mud, and brings up whatever it may happen to meet with, and from this mouthful of stuff it selects, by the aid of that member alone, whatever is good for food; while what is useless escapes through the straining apparatus at the sides of the bill. In comparison with this remarkable structure of the beak, the other characters whereby these birds are distinguishable become of secondary importance, nevertheless they also are somewhat striking. The slightly elongated body is strongly built, the neck either of moderate length, or very long and slender, the high and narrow head of medium size. The tarsus is small or moderate (or, exceptionally, very high), four-toed, and webbed in front. The moderate-sized wings are somewhat pointed; they consist occasionally of but twelve feathers, and are either truncate or rounded, sometimes wedge-shaped or pointed at the extremity. The plumage is always close, smooth, and well packed with down. The distribution of the various races of these birds is more limited than that of many Natatorial families, and some of them at certain seasons migrate regularly from colder to warmer climates, and vice versâ.