Blue-and-black Tanagers (Tangara vassorii) are vibrantly-colored, tropical birds that occur in the Andes of northwestern South America from Venezuela to Bolivia. They live at higher elevations than any other species of Tangara (Isler and Isler 1987). There are three subspecies, all of which occur in the upper montane evergreen forest, elfin forest, and tall secondary growth forest in the Andes (Parker et al. 1996, Isler and Isler 1987). Their diet consists of a variety of fruits as well as some insects. Rarely found alone, they live mostly in mated pairs and regularly join large mixed species flocks when foraging at abundant sites. There is little information regarding their behavior, population dynamics, and demography. The conservation status of the Blue-and black Tanager is listed as a species of Least Concern by the IUCN. Furthermore, the Blue-and-black Tanager has been described as "fairly common" (Parker et al. 1996), although there is currently no quantifiable information regarding the population size or trend of the species.