Impalas congregate in herds varying from eight or ten up to 150 in number. In the small herds there is usually only one adult buck, but in the larger herds there are several. I have seen herds composed entirely of bucks. On account of the nature of the ground which they usually frequent they are fairly easy to stalk. When alarmed they have a curious habit of bounding up into the air, and present an amusing sight when many of them are jumping about at the same time. In common with many other bush-loving antelopes, they often have difficulty in making out the direction whence a shot comes, and if the sportsman takes care to keep out of sight he may get several shots before they finally make off. The impala is a grass feeder. LITHOCRANIUS WALLERI [Illustration: The Walleri] The Walleri is plentiful on the banks of the Tana river, and there are a fair number at Merereni. It is also found in the Kilimanjaro district. The East African walleri is very much smaller than the one found in the Somali country. There is no mistaking this antelope for any other, on account of its extraordinarily long and thin neck, which in a fully adult buck, killed by myself at Merereni, was only 10 ins. in circumference; two females measured 7 ins. each round the neck. When walking and seen at a distance they look not unlike pigmy giraffes, as they carry their long necks stretched out at an angle. They frequent the open bush fringing the outskirts of dense thickets, into which they at once retreat on being disturbed. Their note of alarm is a low short ‘buzz!’ The Walleri is essentially a bush feeder. At Merereni I once watched a doe feeding on a small-leaved bush, not unlike the privet in appearance, and several times saw her rear up on her hind-legs, bend down a branch with her forelegs, and feed on the leaves in this upright position like a goat. This quaint-looking little antelope, like the bush-buck, will haunt one particular spot, and may be seen in or quite near to it for weeks together. The sportsman, if encamped near a place where he has seen one of them in the morning, but has been unable to get a shot at it, may have a very fair chance of finding it feeding about the same place if he goes out again in the evening between five o’clock and sundown, keeping close to the edge of thick bush. These bucks are very shy, and by no means easy to stalk; and as they have a happy knack of hiding behind bushes in the most effective manner, they are very difficult to see. THE DUYKER