Montezuma Oropendola (Psarocolius montezuma)

The Montezuma Oropendola may not be the prettiest, but they nests are amazing. Typically a colony of these birds construct their long hanging nests in the same tree. Their display is also intriguing. Not only the metallic quality of their song is unique, but the way they hang themselves from the branch, spreading wings and then returning to their upright position is impressive.