Acanthiza pusilla
The Brown Thornbill (Acanthiza pusilla) is a diminutive and often overlooked passerine endemic to eastern and southeastern Australia, embodying the essence of a 'little brown bird.' Measuring a mere 9-11 cm in length and weighing just 6-8 grams, it boasts a cryptic plumage of dull olive-brown upperparts, a rufous wash on the rump and flanks, and paler underparts. A key identification feature is its reddish-brown eye, which stands out against its finely streaked throat and breast, subtly trans...
Found in a variety of dense understorey habitats, including wet and dry sclerophyll forests, woodlands, heathlands, rainforest edges, and suburban gardens, from sea level to subalpine zones.
Primarily insectivorous, feeding on small insects, spiders, and their larvae gleaned from foliage, bark, and ground litter, occasionally supplemented with small seeds.
Brown Thornbills are active insectivores, typically observed singly, in pairs, or in small family groups, often joining mixed-species foraging flocks, particularly with other thornbills and scrubwrens. They exhibit a characteristic skulking behavior, moving swiftly and unobtrusively through dense...
The Brown Thornbill is widely distributed across eastern and southeastern Australia, encompassing a significant portion of the continent. Its breeding range extends from southeastern Queensland, south through New South Wales, the Australian Capital Territory, Victoria, and into southeastern South...
Least Concern
- Despite their commonality, Brown Thornbills are often overlooked due to their small size, cryptic coloration, and preference for dense vegetation, earning them the nickname 'mouse-birds'. - They are one of the most frequently recorded species in eBird observations across eastern Australia, high...