The Thick-billed Euphonia. measures approximately 3.9 inches in length, the male is characterized by its striking yellow underparts and a dark blue-black upper body, with a distinctive yellow crown patch extending from the bill over the head. In contrast, the female presents a more subdued appearance with dull olive upper parts and yellow lower parts. This species is native to the tropical forests of Central and South America. They inhabit a variety of environments, including subtropical or tropical dry forests, moist lowland forests, and areas of heavily degraded former forest. Thick-billed Euphonias are known to occur at elevations of up to 4,000 feet along the foothill of the Andes. Their population is estimated to be above 5,000,000 individuals, and are classified as Least Concern on the IUCN Red List. Behaviorally, these birds are social and often seen in small flocks. They are primarily frugivores, feeding on a variety of fruits, but also consume insects and nectar. Their fruit-based diet plays a crucial role in seed dispersal, thereby contributing to the maintenance of forest diversity. The breeding season varies according to their range, occurring between March to June in the northern parts and between September to December in the southern parts. During breeding season, males exhibit courtship displays characterized by fluffing out their feathers and singing loudly. Photographed in the department of Santander, Colombia.