Adult male Flame Robin.
See, my burning front of flame
Puts the crimson rose to shame;
And my singing leads the chorus of the morning;
But my silent little mate,
Mute upon the garden gate,
Sober jenny, hasn't any such adorning.
From The Flame-Breasted Robin
by C J Dennis (1876-1938)
The Singing Garden (1935) p.39.