I have painted a few of these birds - just love their colouring.
The Eastern Bluebird is the state bird of Missouri and New York. They are measure 16 - 21 cm in length and weigh between 27 - 34 grams.
Eastern Bluebird measures 6 x 6 inches and is painted on Raymar Feather Lite Canvas panel.
Many thanks to Rodney Campbell for the reference photo.