It has a semicircular ear patch, pale yellow in colour.

"Do they sell Dramamine or those ear patches for motion sickness?"

Scent glands are located near the white ear patches in both sexes.

Male broad moustache mark, part of ear patch and (sometimes) lores red.

It can be identified by its dark ear patch (the auricular).

The species is named for its distinctive, medium-sized bright white ear patch.

It has blackish eyes, black surrounding the white ear patch, and the same brown, for its crown as the wings/back.

Bright blue head color, with blackish ear patches.

They also used black hair dye to artificially reduce the size of the ear patches.

Males with artificially-reduced ear patches seemed to have less success finding a female.