Blue-necked Tanager is an active tanager (Isler and Isler 1987). Blue-necked Tanager perform acrobatic contortions, hanging upside down on slender branches. Forages mostly in the crowns of bushes and small trees; median foraging height was about 8 m off the ground; rarely went above 15 m (6%).
Blue-necked Tanager considered to be not territorial. The home range size is not documented.
Social and interspecific behavior
The Blue-necked Tanager usually forages independent of mixed tanager flocks, generally in pairs or small groups; mostly frugivorous. Most individuals live in pairs or in small groups of 3-5 individuals. These groups may consist simply of parents and their offspring. Sometimes follow flocks containing other Tangara along forest borders.