COURTS OF JUSTICE 149 



One of the most remarkable phenomena in the 

 life history of these strange birds is their ability to 

 form and disgorge gizzard-sacs, or sausages. These 

 sausages contain several kinds of food, such as liz- 

 ards, small fruits, seeds, and bits of tender roots. 

 They are adaptations which permit the male to 

 feed the female a sufficient amount of food at one 

 visit to last for some time. Otherwise his oft- 

 repeated visits might disclose the position of the 

 nest to enemies, and thus lead to her annoyance or 

 destruction. The natives call the hornbill the "jeal- 

 ous bird," because it is said that if the male suspects 

 that another bird has visited his home in his ab- 

 sence, he deliberately seals his mate up in the place, 

 and goes away, leaving her to die of hunger.* 



It has often been observed that animals attack 

 and destroy certain enemies on sight for no reason 

 of appetite; and no cause can be ascribed to this 

 except that of self -protection. There seems to be 

 a complete understanding on their part that their 

 welfare depends upon the destruction of all indi- 

 viduals of that race that they meet. This possibly 

 accounts for the antipathy of the cat for the dog, 

 the crow for the owl, the mangouse for the cobra. 

 Through generations birds have learned that other 

 birds look upon them or their nestlings with mur- 



