It had a black velvet-like facial mask on the front part of the head. There are several discrepancies in how the colour of the body, wings, tail feathers and the head have historically been described and depicted. In 1674, Dubois described live specimens as being "petit-gris" which is the colour of the dark phase of the red squirrel.
The description of the bird's body, wings, tail feathers, and head has been inconsistent in historical accounts.