Taken back in May 2016.
Previously called a Solitary vireo now it's the blue headed vireo.
Usually the are difficult to see but this one popped up right in front of me.
The Blue-headed Vireo is the easternmost form in the "Solitary Vireo" complex. Formerly considered one species, three species now are recognized. In appearance it is the most brightly colored of the three.
source - Cornell Lab of Ornithology.