no. 7 



FLOCKS OF NEOTROPICAL BIRDS — MOYNIHAN 



2 9 



Table 23. — Data from observations near Gamboa between July 12 and 



August 15, i960 



Unambiguous interspecific joining reactions by tanagers, honeycreepers, and 

 finches. (No warblers were seen to perform unambiguous interspecific joining 

 reactions in this area during this period of observation.) 



No. of 

 cases seen Species joining 



2 Palm tanager 



2 do. 



3 Blue tanager 



3 do. 



1 Blue dacnis 



1 Crimson-backed tanager 



1 Buff -throated saltator 



1 do. 



Species being joined 

 Plain-colored tanager 

 Blue tanager 

 Plain-colored tanager 

 Palm tanager 

 Palm tanager 

 Blue tanager 

 Plain-colored tanager 

 Blue tanager 



Table 24. — Data from observations near Gamboa between July 12 and 



August 15, i960 



Interspecific supplanting attacks by tanagers and finches. (No honeycreepers 

 or warblers were seen to perform interspecific supplanting attacks in this area 

 during this period of observation.) 



* This bird was almost certainly a female or juvenile male variable seedeater. 



Table 25. — Data from observations near Gamboa between July 12 and 



August 15, i960 



The number of times species of the blue and green tanager and honeycreeper 

 alliance were seen to leave mixed flocks in a very conspicuous manner without 

 being followed by individuals of other species. 



No. of times 

 Species seen 



Plain-colored tanager 7 



Palm tanager 5 



Blue tanager 10 



Red-legged blue honeycreeper 1 



Crimson-backed tanager 6 



Thick-billed euphonia 1 



Buff-throated saltator 1 



Green-backed sparrow I 



Yellow-bellied seedeater t 



