South-eastern Australia from south-central and south-eastern Queensland south to south-eastern South Australia (south to southern Eyre Peninsula and Kangaroo I) and southern Victoria.
 
Population
Estimated population is 200,000 (2010) and decreasing.
Diamond Firetail (Stagonopleura guttata) [XC151603]
by nick talbot from Genowlan Rd, Glen Alice, New South Wales, Australia (call)
Diamond Firetail (Stagonopleura guttata) [XC576504]
by Marc Anderson from The Pilliga, New South Wales, Australia (song)
Nest
Bottle-shaped, bulky, on its side, composed of dried grasses and lined with feathers, in a bush or tree in thick foliage. Sometimes in the outer, loose, material of an eagles or crows' nest.
Eggs (Guide)
4 - 7; pure white; oval; about 18 x 13 mm. Incubation: 12 - 15 days; by both sexes.
Young
Altricial, nidicolous. Fledge in 10 - 12 days.
The Field Guide to the Birds of Australia Pizzey, G., and Knight, E., 1997, Angus & Robertson, Sydney ISBN 0 207 19691 5
Field Guide to Australian Birds Morecombe, M., 2000, Steve Parish Publishing Pty Ltd. ISBN 1 876282 10 X
Field Guide to the Birds of Australia Simpson, K., and Day, N., 1999, 6th Edition, Viking ISBN 0 670 87918 5
Reader's Digest Complete Book of Australian Birds 1988, 2nd Edition, Reader's Digest ISBN 0 949819 99 9
What Bird is That? 1984, Revised Edition, Angus & Robertson, Sydney ISBN 0 207 14846 5
Handbook of Australian, New Zealand & Antarctic Birds 1990 - , Oxford University Press, Melbourne ISBN 0 19 553244 9