32 TRAITS OF YOUNG CHIMPANZEES 



defense. Sometimes he will jump up and down swinging his 

 arms and waving his hands as if they were pivoted at the 

 wrist. 



The other amusingly expressive reaction in connection 

 with play he has never exhibited in his relations with me, but 

 several times when romping with a lady attendant or with a 

 small group of admiring observers at hand. The act consists 

 in either standing on his head or resting on his hands with 

 head near the floor and throwing into the air either one or 

 both legs, at the same time shaking it or them in a manner 

 which suggests complete relaxation. This leg movement is 

 similar to the hand movement described above. The whole 

 performance makes the observer feel that he is trying to give 

 one the chimpanzee "glad hand. " The peculiar thing about 

 it is that he should use his leg instead of his arm. 



Fondness for music or at least for rhythm was exhibited 

 by the animals, but more particularly, perhaps because of his 

 more abundant energy and activity, by Chim. On occasion 

 he would dance about keeping time to music and showing 

 appreciation of rhythmic sounds and of the excitement atten- 

 dant on music and human companionship. Panzee never 

 danced and, although interested in music, gave no clear indi- 

 cation of satisfaction in it. It is not improbable that the 

 dance movement in the young male is related to courtship 

 behavior. 



Although the chimpanzee is incapable of shedding tears, it 

 exhibits its displeasure or discomfort by facial expression 

 and by a combination of sounds and facial expression which 

 may properly be described as weeping. Satisfaction and joy 

 were expressed by my young animals in varied ways, among 

 them the patting of shoulder, being peculiar to Panzee, and 

 pronounced laughter, peculiar to Chim. The smile or laugh 



