Fig. 2. — Display postures of adult male yellow-rumped tanagers. 

 From top to bottom : 



a. Posture assumed by a male after a dispute with another male. With 

 extreme Back-ruffling. At first the bird in this posture was silent; then it 

 uttered Thin Rattles and/or pure Rattles. 



b. Posture of a male immediately after Turning-away from a female at 

 the height of the breeding season. The wings are drooped but there is no 

 Back-ruffling. The bird was silent while it remained in this posture. 



c. Posture of another male immediately after Turning-away from a female 

 (with a second male perched near by). With Head-ruffling, Back-ruffling, 

 and Tail-fanning. The Head-ruffling is somewhat anomalous, but closest 

 to the "angular" type. The bird was silent while it remained in this posture. 



d. Silent Bill-up Tail-up Posture, with Crown-flattening and asymmetrical 

 positioning of the wings, assumed by a male immediately after an apparently 

 successful copulation. (The tail may have been raised a little higher during 

 part of the time that the male remained in the posture.) 



IS 



