494 
AFRICAN GAME ANIMALS 
beests were the more wary. We found waterbuck cows 
with calves so young that they had not yet joined the herd, 
on the Northern Guaso Nyiro in September, in the Uasin 
Gishu in November, and in the Lado in January; we believe 
that there is no regular breeding time. 
The heavy bulls will not tolerate the presence of young 
bulls with the herds, forcing them out, to form bachelor 
groups of their own. The master bulls fight fiercely among 
themselves, and when at bay, especially if standing in a pool 
of water, are formidable antagonists to dogs. They are not, 
however, by any means as dangerous as sable, roan, oryx, or 
wildebeest. Against the lion, next to man their greatest 
enemy, they can make no effectual resistance. 
Key to the Races of defassa 
Pelage long and heavy 
Body color reddish, cinnamon-rufous 
defassa 
Body color darker brown with little rufous in the coat 
Body color cinnamon-drab, the nape and crown of head rufous 
Body color hair-brown or dusky-drab 
Snout black as far as the interorbital region; body color 
not suffused with cinnamon 
tjaderi 
Snout black only on anterior half; body color suffused 
with cinnamon 
Pelage short and thin 
rameyi 
Body color reddish, cinnamon-drab 
Body color drab or hair-brown 
matschiei 
Body size smaller, horns shorter 
Body size larger, horns longer 
