Our attention is caught by the wonderful wealth of bird-life now spread out before us in every direction. Here comes a flock of the curious clatter-bills (_Anastomus lamelligerus_, Tem.) in their simple but attractive plumage. They have come in quest of food. Hundreds of other marsh-birds of all kinds have settled on the outspread branches of the trees, and enable us to distinguish between their widely differing notes. Among these old trees that overhang the river, covered with creepers and laden with fruit of quaint shape, are Kigelia, tamarinds, and acacias. In amongst the dense branches a family of Angolan guereza apes (_Colobus palliatus_, Ptrs.) and a number of long-tailed monkeys are moving to and fro. Now a flock of snowy-feathered herons (_Herodias garzetta_, L., and _Bubulcus ibis_, L.) flash past, dazzlingly white--two hundred of them, at least--alighting for a moment on the brittle branches and pausing in their search for food. Gravely moving their heads about from side to side, they impart a peculiar charm to the trees. Now another flock of herons (_Herodias alba_, L.), also dazzlingly white, but birds of a larger growth, speed past, flying for their lives. Why is it that even here, in this remote sanctuary of animal life, within which I am the first European trespasser, these beautiful birds are so timorous? Who can answer that question with any certainty? All we know is, that it has come to be their nature to scour about from place to place in perpetual flight. Perhaps in other lands they have made acquaintance with man’s destructiveness. Perhaps they are endowed with keener senses than their smaller snow-white kinsfolk, which suffer us to approach so near, and which, like the curious clatter-bill (which have never yet been seen in captivity), evince no sign of shyness--nothing but a certain mild surprise--at the sight of man. [Illustration: _C. G. Schillings, phot._ KIBO IN THE FOREGROUND, WITH THE SADDLE-SHAPED RANGE CONNECTING IT WITH MAWENZI IN THE DISTANCE. THE AVERAGE HEIGHT OF THIS “SADDLE” IS MORE THAN 16,OOO FEET.] Now, with a noisy clattering of wings, those less comely creatures, the Hagedasch ibises, rise in front of us, filling the air with their extraordinary cry: “Heiha! Ha heiha!”