The Painted bunting (Passerina ciris)

The male Painted bunting  is often regarded as the most beautiful and spectacular of all North American songbirds. Their heads are a deep, but bright blue and their backs are green and they have a red breast and under parts. 

Male Painted Bunting - Doug Janson - CC BY-SA 3.0

 Although males are brightly colored they are difficult to spot in undergrowth as their coloring makes excellent camouflage. Females and immature males are yellowish green and green being darker on their backs than their under parts and are also well camouflaged.  Read more