Fam. VII. Rhinochetidae.–This contains only one species, Rhinochetus jubatus, the Kagu of New Caledonia, a very old and generalized form, somewhat bigger than an ordinary fowl, which was originally referred to the Herons and then to the Cranes, but is undoubtedly nearly allied to the latter, and approximates rather closely to Eurypyga.[[180]]
Fig. 55.–Kagu. Rhinochetus jubatus. × ⅕.
The head and eyes are large; the neck is strong; the bill is Heron-like, but somewhat flat above, with a wide nasal groove. The sternum is weak and narrow, having no posterior notch; the furcula is U-shaped; the legs are moderately long and slender, the toes Rail-like, with curved claws; the tibia is half bare, the metatarsus scutellated, with smaller scales behind. The wings are moderate, broad, and rounded, though less developed than in Eurypyga, the primaries being ten in number, and the secondaries–of which the inner exceed the primaries–thirteen; the tail is fairly long and ample, with twelve rectrices. The aftershaft is large; the nostrils are impervious, contrary to the rule in the Order, being severally overhung by a peculiar rolled-up membrane, said to protect them when the beak is thrust into the soil; the tongue is lanceolate. Powder-down patches are profusely distributed over the whole body, except towards the remiges and rectrices. The plumage is slaty-grey, with indistinct dark bars on the wings and tail; but when the former are expanded, rufous and white bands appear, varied by black markings; while a long, erectile whitish-grey crest adorns the occiput and nape. The bill and feet are orange-red. In adults down covers the whole surface. Possibly the chicks remain a considerable time in the nest, but this is by no means certain; those of Eurypyga do so, it is true, but those of Cranes and Rails do not. Immature specimens are more rufous, with black bars above.
Though formerly the Kagu was not rare in its native island, it is now restricted to the wilder portions, where it is to be met with among the rocks of craggy ravines or near stagnant waters, sleeping throughout the day and issuing from its concealment towards evening. It walks quickly, yet in a stately manner, often coming to a standstill or crouching, and remaining motionless for a long period; but it can also run rapidly with the head and neck outstretched, and the body carried after the manner of a Rail. The habits in confinement, however, make it somewhat doubtful whether the bird is as nocturnal as is asserted, for in the daytime it is quick and lively in its motions, chasing its fellow-captives, dancing round with the tip of its outspread wing or tail held fast in its bill, tossing about dry leaves or pieces of paper, spreading out its wings and thrusting its beak into the ground, kicking with its legs, and finally tumbling about as if in a fit. The note is guttural and rattling, or almost a scream; the food consists of molluscs, worms, and insects, sought for among the grass or in crannies, while the bill is often plunged into the soil, and worms pulled out, shaken and swallowed. When in quest of food the bird often paws the earth with gentle strokes, and snails are usually beaten upon the ground to break the shell. It will bathe in captivity, and is said to like wet weather in its native haunts. The nest is unknown, but eggs laid at the Zoological Society's Gardens in London are reddish-buff with brown and grey markings, and recall those of the Woodcock or Corncrake.[[181]]
Fam. VIII. Eurypygidae.–Two species of Eurypyga are comprehended herein, namely, E. helias of the countries from Venezuela to Bolivia and Central Brazil, and E. major of Central America, Colombia, and Ecuador. These are, like the Kagu, very ancient types, but whereas that bird shows some affinity to Scopus, these trend rather towards Nycticorax, both being, however, essentially Gruiform. The neck is long and thin, the bill rather slender, with grooves on the maxilla and mandible: the whole leg and foot are as in Rhinochetus, but shorter, weaker, and reticulated behind; the wings and tail are even more ample, while the number of primaries and rectrices are the same, but the secondaries are only eleven, and the inner feathers comparatively short. The nostrils are pervious, the tongue is lanceolate, the furcula is U-shaped, the after-shaft is diminutive, and the powder-down patches are abundant, though writers differ as to their extent. E. helias–as Prof. Newton says in his excellent account[[182]]–is not to be described in a limited space otherwise than generally; it has a black head, with a white stripe above and under each eye, and a white throat: the remaining plumage "being variegated with black, brown, chestnut, bay, buff, grey, and white–so mottled, speckled, and belted either in wave-like or zigzag forms, as somewhat to resemble certain moths. The bay colour forms two conspicuous patches on each wing, and also an antepenultimate bar on the tail, behind which is a subterminal band of black. The irides are red; the bill is greenish-olive; and the legs are pale yellow." E. major is larger and more uniform in colour. Both adults and nestlings have copious down, that of the latter being lightish brown with lines and spots of darker brown and white. The sexes are similar.
Fig. 56.–Sun-Bittern. Eurypyga helias. × ¼.
The "Sun-Bittern," to use its common but misleading name, is found on the larger rivers, where the banks are wooded and swampy; it is shy but easily tamed, and, according to Bates, is kept in captivity by the Brazilians. It walks quietly and circumspectly with horizontal body and outstretched head, and probably flies but little. Like the Kagu, it executes a fantastic dance, but in this case the wings and tail form a semicircle which nearly conceals the body. The note is a soft or plaintive long-drawn whistle, the food consists mainly of small fish and insects, which the bird spears by darting out its head quickly. The nest, said to be made of sticks, grass, and mud, with a lining of the latter, is placed on low branches, and contains several eggs similar to those of the Kagu, but smaller. Both parents incubate and attend to the young, which have several times been reared in the Zoological Society's Gardens in London.[[183]]
Fam. IX. Heliornithidae.–The Finfoots, comprising three genera and four species, now generally coupled with the Rallidae, have been placed near the Divers and Grebes by several authors. The head is small, the neck thin, the bill Rail-like and fairly stout; the metatarsus, which is scutellated anteriorly and reticulated posteriorly, is short, twisted outwards, and deeply grooved; while the toes have short, sharp claws, and broad scalloped webs, extending in Heliornis to most of their length. The long pointed wings have twenty-one remiges, of which eleven are primaries, and are armed with a curved spine; the tail consists in Podica of eighteen elongated, stiff, ribbed rectrices, which are narrow and pointed, and in Heliopaïs and Heliornis of rather soft, short, rounded feathers. The plumage is close, but not glossy as in Grebes; there is no after-shaft, the U-shaped furcula ancyloses with the sternum, the tongue is lanceolate, and the nostrils are pervious.