Yellow Warbler
Birds of Panama - large bird photo gallery
The American Yellow Warbler (Setophaga petechia, formerly Dendroica petechia) (35 subspecies) is a New World warbler species. Sensu lato, they make up the most widespread species in the diverse Setophaga genus, breeding in almost the whole of North America and down to northern South America. It is migratory, wintering in Central America was and South America. Lives in mangroves, coastal dry forests and shrubs near water, reservoirs and rivers in the lowlands. They feed on insects and spiders. The northern races also eat berries. They nest in herbaceous plants. Both male and female feed the chicks. For more details from Wikipedia about the Yellow Warbler please see this page here.
This image was taken in Altos del Maria, Panama.