The Treecreeper climbs a tree from the lower parts and works its way up the tree searching for food using its large claws and a long tail in a hopping/jerky spiral motion and using both claws, at the same time keeping its tail straight as it moves up and around the tree. It is unable to climb down the tree the same way, so it flies from the top of the tree to the lower parts of another tree searching for food. They use their bills which are gently curved down and long, probing under the bark for all kinds of small invertebrates and insects, earwigs, moths, beetles and spiders: they all make up the Treecreepers diet. They like to nest behind a large flap of tree bark which gives the nest protection. The base of the nest is built from loose twigs covered in moss, grass, and roots. The female lays 4-8 eggs which are buff coloured with brown/red speckles. The female incubates the eggs for 12-15 days, and when hatched both adults feed the chicks for another 14 days until they fledge. The chicks are competent climbers but their first flights are risky, but they quickly improve.