The little grassbird, Poodytes gramineus, is a modestly adorned avian, cloaked in an olive-brown to brown-grey plumage. It is a small bird, stretching a mere 13 to 15 cm from beak to tail. A pale eyebrow and dark grey streaks adorn its throat, crown, and cheeks, while its upper body is mottled with dark grey. The underparts are a lighter grey, also bearing streaks, and the wing feathers are dark with contrasting white edges.
When attempting to identify the little grassbird, look for its pale eyebrow and the streaking across its throat, crown, and cheeks. The bird's overall brown-grey coloration with lighter grey underparts and streaks can be quite distinctive. Both adult males and females are visually similar, though males tend to be slightly larger in size.
The little grassbird is a denizen of dense wetland vegetation, favoring habitats such as reed beds, rushes, lignum swamps, and salt marshes. It is also known to inhabit shrubs, saltmarsh, and low mangroves, and may venture into temporary wetlands following periods of rain.
This species is widely distributed across Eastern Australia and Tasmania, extending inland to Central Australia and South-Western Australia. It also has a presence in West Papua, Indonesia, though its occurrence there is not as common or widespread.
The little grassbird leads a nomadic existence, moving through its habitat with no regular migration patterns. It is an inconspicuous bird, often remaining hidden within the dense cover of vegetation. Known for readily engaging in conversation with people, it is more often heard than seen.
The vocalizations of the little grassbird are described as a "plaintive three-noted monotone, tee-ti-teee," and during the breeding season, it emits "a sequence of 2-3 plaintive piping whistles p-pee-pee repeated incessantly."
Breeding occurs from August to December or after significant rainfall. The nests are deep and cup-shaped, woven from grass, twigs, and stems, and lined with feathers, often from the Australasian swamphen. These nests are well-concealed in tall grasses, reeds, or low shrubs. The clutch typically consists of 3-5 whitish or pink-white eggs speckled with grey.
The tawny grassbird and the striated fieldwren are two species that bear resemblance to the little grassbird. The tawny grassbird is slightly larger and more rufous, especially on the crown, while the striated fieldwren can be differentiated by its yellow underparts and distinctive white eyebrows.
Insects and small arthropods make up the diet of the little grassbird. It forages within the shelter of grasses and swamp vegetation, adeptly navigating its densely vegetated world.
The IUCN has classified the little grassbird as Least Concern, with a population trend that appears to be increasing. BirdLife Australia also lists the species as secure across all states.