As their name implies, treecreepers forage for insects and other small creatures living on and under the bark of trees, mostly eucalypts, though several species also hunt on the ground, through leaf-litter, and on fallen timber.

The Australasian treecreepers are small oscine songbirds, measuring 14 to 19 cm (5.5–7.5 in) in length and weighing 17–44 g (0.60–1.55 oz).

They have relatively long tails, short legs with strong feet, stout bodies and longish and slightly down-curved bills.

Other differences between the sexes are common, and can arise very early in the life of these birds, being present even in late-stage nestlings.

[3] The Australasian treecreepers are essentially non-migratory, although there are distinct differences in the dispersal of young birds after fledging, especially between the two genera.

[1] The breeding season lasts from June into January, the birds lay 2-3 eggs per clutch with an incubation time of 17 days.