A small flock feeds among grass heads, then vanishes into a nearby shrub as someone passes. For Red-browed Finches, the grass and the thicket are connected resources. A place to obtain seeds is more useful when a bird can also reach shelter without a long trip across exposed ground.
Look for the red in several places
The Australian Museum describes bright red on the eyebrow, bill and rump against olive-green upperparts and grey underparts. Adult males and females look similar. The eyebrow is a marking above the eye, not the complete white ring seen on a Silvereye.
Use the whole combination. A flash of red disappearing into cover may be a helpful clue, but it is not a complete identification. Let birds return to feeding naturally rather than following them into the understorey for a closer view.
BirdLife notes that Red-browed Finches can forage with other seed-eating birds and alongside small insect-eaters such as fairy-wrens and thornbills. A mixed feeding gathering is another reason not to give every bird the same name from a quick look at the group.
Seed is found on the ground and on the plant
Both accounts describe seeds and insects taken at ground level, with birds also feeding while perched on seeding grass heads. The plant can therefore supply food before its seeds fall. A tightly maintained patch that never develops a seed head offers a different resource from grass allowed to complete that stage.
That does not mean every untended grassy patch is suitable habitat, or that invasive weeds should be planted. The Museum’s observation that finches use some weedy places explains how they use available cover and food; it is not a recommendation to spread those plants.
In a garden, consider locally appropriate native grasses and nearby dense vegetation. Keep necessary access and safety areas clear. A manageable seeding patch beside existing cover is a more specific experiment in habitat than putting a feeder in the middle of a bare lawn.
Dense cover has another job at breeding time
The nest is a substantial domed structure of grass and twigs, with a side entrance, built in dense vegetation. The Museum and BirdLife describe both parents sharing construction, incubation and care of the young.
Do not look inside a dome to establish whether it is occupied. A bird carrying material or repeatedly visiting a shrub is enough reason to leave that place undisturbed. A feeding flock, a pair building and adults feeding young are different observations; flock size alone cannot reveal how many nests are present.
The Museum gives a broad October-to-April breeding window. Local weather, food and an individual pair’s activity matter more than treating those months as a guarantee that a particular shrub contains eggs today.
Watch the route between food and cover
From a fixed, unobtrusive position, note whether birds take fallen seed, reach a grass head or search for another small food item. Also note where they retreat when ordinary foot traffic passes. Stop moving closer if your presence repeatedly interrupts feeding.
Leave the exact position of an active nest out of public posts. Keep pets away from the low vegetation the birds use, and use licensed wildlife advice if a bird is visibly injured rather than catching or feeding it yourself. A useful record of this small finch includes the grassy feeding edge and its shelter, not just the red eyebrow.