A medium-sized parrot from foothill to mid-montane forest. Uniformly green with a black bill and pale eye. Male has a full pale-gray collar with a thin blue edge around the front. Often seen flying in flocks and difficult to see perched. In flight, bulky head and thinner tail gives a front-heavy appearance. May overlap altitudinally with similar sized Red-cheeked Parrot, but Blue-collared Parrot has an all green head. Best identified by voice. Call, a ringing, tuneless jumble of up and down notes.