Bustards can be circumvented by riding round them in constantly diminishing circles, and they are also captured with Falcons.[179] A fossil _Otis_ is recorded from the Miocene of France and Germany. 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] {264}[Illustration: 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 {265}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.