The Diamond Firetail - Stagonopleura guttata - has a maroon bill with smoky grey crown and nape. Prominent black patch between eye and beak ('lores'), eye is same colour as bill. Throat is white above a prominent black breast band, underside is white. The black breast-band extends along the flanks where it is marked with sharply defined white dots - these are the diamonds in the common name. The back and wings are brown; rump is bright red. Reaches 12 to 13 centimetres in length.
Adult female similar to adult male with narrower breast band, coral coloured bill and eye ring. Juveniles have a black bill, grey instead of black breast band and flanks and partly red rump.
Feeds exclusively on the ground. Lives in grassy ground cover underneath open forests, woodland, mallee, acacia, shrubland and timber along watercourses and roadsides. Usually in small flocks of 20 to 30 birds. Tends to nest in loose, scattered colonies. Large flocks fly in long lines.
Sedentary or locally migratory, uncommon, patchy occurrence.