14 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I49 



Fig. 1. — Apparent relationship between the most common and/or most easily 

 recognized vocal patterns of adult male yellow-rumped tanagers. (NN=Nasal 

 Notes. HN=relatively soft Hoarse Notes. HS=Hoarse "Screams." GR= 

 "Greeting" Notes. R=pure Rattles. TR=Thin Rattles. MR=Muffled Rattles. 

 TZ="Tzzheet" Notes. HF=Hoarse Flourishes. K="Kioo" or "Klioo" 

 Notes. TS=soft "Tsit" Notes.) 



The size of the circles representing different types of notes is very roughly 

 proportional to the frequency of the notes. The thickness of the lines connect- 

 ing the different types of notes is very roughly proportional to the frequency 

 of intermediates between the notes connected. 



All the vocal patterns to the left of the zigzag line seem to contain hostile 

 components (i.e. seem to be produced by hostile motivation, alone or in com- 

 bination with other nonhostile tendencies). All the patterns to the right of 

 the dotted line are frequently or always partly or wholly sexual. 



