MENTAL TRAITS 37 



He evidently preferred to make a fresh start in a new location 

 each time. 



On the ground or indoors nests may be constructed of 

 almost any available materials — even a rug serving the 

 purpose by being pulled together and folded. 



Panzee once or twice was seen to climb a tree to look at a 

 nest which Chim had built or to lie in it. Ordinarily, how- 

 ever, she paid no particular attention, either to the process of 

 construction or to the completed nest. 



Although in case of these young chimpanzees only the male 

 built tree nests, it is reported by the observers of the Canary 

 Island Station that all of their animals exhibited this form of 

 activity. Presumably under the conditions of observation 

 both in New Hampshire and in the Canary Islands nest 

 building was primarily play or exercise. It may also have an 

 element of practice. 



To see the birches of a New Hampshire hill pasture filled 

 with chimpanzee nests makes one feel queer. Perhaps the 

 chimpanzees themselves feel at least as much out of place in 

 this environment as the nests seem to us. 



This account of the daily life, habits, and temperamental 

 characteristics of Chim and Panzee, despite its lack of cer- 

 tain scientific attributes, is, I believe, justified by the paucity 

 of our dependable knowledge of the nature of this race of 

 anthropoids. While regretting the fragmentariness and 

 obvious incompleteness of the observations which are 

 reported, I am confident that they are worthy of record 

 because few persons trained to the careful study of animal 

 behavior have been intimately associated with young chim- 

 panzees for months at a time. 



