58 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I43 



individuals of any other species in predominantly honeycreeper flocks. 

 This may be illustrated by the figures in table 44, which is based 

 upon observations of birds in two large flowering trees in the clearing 

 on Barro Colorado Island between December 19 and December 23, 

 1959. During this period these trees were visited by individuals of 

 many species of the blue and green tanager and honeycreeper alliance, 

 separately and/or in mixed flocks. Almost all the mixed flocks seen 

 during this particular series of observations were predominantly 



Table 44. — Data from observations on Barro Colorado Island between 

 December 19 and 23, 1959 



The number of times individuals of some species of the blue and green tanager 

 and honeycreeper alliance were seen in mixed flocks (predominantly honey- 

 creeper flocks) and apart from mixed flocks. 



No. of times No. of times 



individuals individuals 



seen in seen not in 



Species mixed flocks mixed flocks Totals 



Plain-colored tanagers 44 4 48 



(92) 

 Palm tanagers 19 8 27 



(70) 

 Blue tanagers 17 9 26 



(65) 

 Green honeycreepers 20 14 34 



(59) 

 Red-legged blue honeycreepers 175 82 257 



(68) 

 Blue dacnises 42 15 57 



(74) 

 Summer tanagers 59 24 83 



(71) 

 Bananaquits 18 39 57 



(32) 



honeycreeper flocks. The figures in the table indicate the number of 

 times individuals of the species most commonly seen during these 

 observations were seen in mixed flocks and not in mixed flocks. These 

 figures were compiled and are arranged in the same way as the cor- 

 responding figures in tables 1, 20, 28, and 35. 



(The results of this series of observations are not included with the 

 results of the other observations on Barro Colorado Island summa- 

 rized in tables 1-19.) 



Red-legged blue honeycreepers usually tend to ignore all or most of 

 their associates in mixed flocks. They join, follow, and supplant indi- 

 viduals of other species comparatively rarely. They are joined, fol- 



