The Black-chinned Honeyeater is the largest Melithreptus honeyeater on the mainland. It is a medium-sized stocky honeyeater with a black head, short black bill and a short tail. Adults are olive green or golden yellow above, pale brown grey to off-white below, with a prominent white crescent across the back of the neck, a black chin bounded by white on each side, and has a bright blue patch of skin above the eye. The northern sub-species, M.gularis laetior, is known as the Golden-backed Honeyeater for its golden-yellow back, and its eye-skin tends to be green to yellow rather than blue. Young birds resemble adults but are duller in colour, with a brown crown and a yellow-orange bill. This species is noisy, gregarious and active, moving in small groups of up to twelve birds throughout the year.