14 



SMITHSONIAN M1SCKI 1.AXE0US COLLECTIONS VOL. 14J 



counted as being in a mixed flock only if there were one or more birds 

 of some other species within approximately 50 feet. Any finch, tana- 

 ger, honeycreeper, or warbler flying in a group with one or more birds 

 of some other species was also counted as being in a mixed flock. Each 



Table i. — Data from observations in and around the clearing on Barro Colorado 



Island b*iw«*n October £6 and December 20, 1959 



The number of times individuals of sonic species of the blue and green tanagcr 

 and honeycreeper alliance were seen in mixed flocks and apart from mixed flocks. 



No. of limes 

 individuals 



seen in No. of times No. of times 



obviously individuals individuals 



integrated seen in seen not in 



Species mixed flocks mixed flocks mixed docks Totals 



Plain-colored tanagers 106 478 500 1047 



(10) (46) 



Falm tanagers Vj 145 156 301 



(9) (48) 



Blue tanagers 18 121 14$ a6g 



(7) (45) 



Golden-masked tanagers o 25 36 61 



(18) (41) 



Green honey creepers 50 113 



(8) (44^ 



Red-legged blue honey- 

 creepers 4 S4 31 115 



(3) (73) 



Blue dacnises o 33 33 66 



(50) 

 Crimson-backed tanagers 1 40 121 161 



(25) 

 Summer tanagers 23 30 53 



(43) 



Fulvous-vented cuphonias ..1 14 II 25 



(4) 



Bananaquits 3 52 8a 134 



(2) (39) 



Yellow warblers 17 75 92 



(18 



bird was counted individually. Thus, for instance, when two tanagers 

 of the same species were seen together they were counted as two in 

 the table. 



Birds other than finches, tanagers. honevcreepcrs. and warblers 

 were counted only when they occurred in association with the latter 

 but were counted in the same way. 



The observer made no attempt to follow any single birds or flocks. 



