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the forest. For several days I studied this nest and the birds 

 and found that both sexes incubated and that the female fre- 

 quently brought food to the male, which was, in this instance, 

 the more diligent in sitting. One of the pair — the one which 

 used to bring food — had the primaries of the right wing 

 broken, from which it was thus always easy to ascertain which 

 of the pair did most of the sitting. "When 1 then shot the latter, 

 it turned out to be the male. 



In the same tree in which this pair had their nest, there 

 was another nest (about a meter below) of the same size and 

 appearance, but this was unoccupied. Whether the same pair in 

 past years had used this or whether they had driven away the 

 pair, that had built it, is not certain. However, as the larger 

 birds of prey, as a rule, year after year utilize the same nest, 

 it is probable that they had driven away the pair, that had 

 once occupied this nest, but had later on built a new one for 

 themselves. 



On the 16 th July I made an excursion into the acacia steppe 

 below the slopes of Elgou. On both sides of a little river, running 

 past a native village, there was very dense forest, and in a tall 

 tree in the immediate vicinity of the Chief's hut a pair of P. a. 

 afrieamis had built their nest. Before sending a native up to 

 the nest I frightened the sitting bird away and it was proved 

 that here too it was the male that incubated. 



In the nest there was a young bird which was, at most, 

 not more than 2—3 days old. 



About 5 minutes' walk from this nest the natives pointed 

 out a large tree, in the top branches of which there were two 

 more vulture nests. Remarkably enough both nests were occu- 

 pied. I climbed up to one of them myself in order to get a 

 closer view of it. 



The exterior arrangement consisted of large and small 

 dry twigs which were securely and well plaited together. 

 The external size of the nest was 1.55 meter and the height 

 60 cm. The nest, as well as the whole top of the tree, was 

 whitewashed by the calciferous excrement of the birds, which 

 had even got in between the materials of the nest, joining them 

 into a firm and in some places into a compact mass. The whole 

 of the upper part of the tree and especially the nest itself emit- 

 ted a foul smell. 



The interior arrangement of the almost flat nest was com- 

 posed of small twigs, autilope hair and feathers, and in the cen- 

 tre there was a little hollow, in which the solitary egg lay. 

 Around the edges of the nest there were also lying the putre- 

 fying remains of some carcass. 



The egg measured and weighed: 



88,4 mm X 66.4 mm. . . . 1830 eg. 



