The buff-rumped thornbill is a small passerine bird species belonging to the genus Acanthiza, most of which are endemic to Australia. Measuring 8–10 cm in length, this unassuming thornbill is characterised by its plain greenish brown upperparts and very pale-yellow underparts, with a distinctive buff coloured rump. The tail has a broad, blackish band with a paler tip. Adults possess white irises, whilst juveniles have dark eyes. The buff-rumped thornbill is one of 14 species within the genus Acanthiza genus, which are recognisable by their thin, pointed bill. Species are unique in their plumage and distribution. Despite their shared name, the genus is not related to hummingbirds.
Region
Southeast Australia
Typical Environment
Occurs from southeastern Queensland through New South Wales and the Australian Capital Territory to eastern and central Victoria. It inhabits open eucalypt forests, dry sclerophyll woodlands, heathy forest edges, and lightly timbered gullies. The species favors areas with a grassy or shrubby understory and scattered mid-storey. It avoids dense rainforests and the arid interior but adapts to fragmented woodland patches where suitable structure remains.
Altitude Range
Sea level to 1500 m
Climate Zone
Temperate
Ease of Keeping
Beginner friendly: 1/5
A small Australian thornbill recognized by its buff-colored rump and white eyes in adults. It forages busily in small groups, often joining mixed-species flocks with weebills and pardalotes. Buff-rumped Thornbills sometimes exhibit cooperative breeding, with helpers assisting the nesting pair. Their thin, pointed bill is specialized for gleaning tiny invertebrates from foliage and bark.
Distribution of Acanthiza reguloides within Australia. Retrieved from Birds in Backyards, 12 October 2023 from https://www.birdsinbackyards.net/species/Acanthiza-reguloides. Used with permission.
Temperament
social and active
Flight Pattern
short rapid wingbeats with low, undulating flights
Social Behavior
Usually found in pairs or small groups that maintain loose territories year-round. Frequently joins mixed-species foraging parties with other small insectivores. Nests are domed structures of grasses and bark lined with softer material, placed low in shrubs or dense vegetation. Cooperative helpers may assist with feeding nestlings.
Migratory Pattern
Resident
Song Description
High, thin trills and tinkling sequences interspersed with short chips. Calls are sharp contact notes used to keep groups together and soft scolds when alarmed.
