These shy, secretive birds are the Amazon’s best-kept secret. They’re tropical, tree-dwelling birds that love forested habitats. Even though they may lack the feather color and vibrancy of other birds on this list, they have brightly colored bills and short tails that give them their beauty. Instead of chirping and vocalizing their appearance, they prefer to sit still and wait for insects. If you listen closely during dawn and dusk, you might hear their repeated, high-pitched whistles (Fatbirder).