11" (28 cm). Adult has two features that distinguish it from others of its kind: its large white orbital eye ring and its dull gray head. Sometimes a blue collar may be seen. The overall body color is green with dark blue outer secondary and primary feathers. In flight, from below, these appear black, and the under parts a lighter green to yellow. The bill is black and the iris are yellow. Gray legs. Like many in this family it is a social bird and may commonly be found in small groups or in flocks up to 100 birds.