What is the habitat of the weebill, one of the smallest birds in the world?

The weebill is a species of bird in the family Acanthizidae, it is an insectivorous passerine that is found throughout mainland Australia.

The weebill is Australia's smallest bird at approximately 8 to 9 cm (3.1 to 3.5 in) long and weighing an average of 6 grams (adult bird). Wingspan is approximately 15 cm (5.9 in). Weebills have inconspicuously coloured plumage ranging from yellowish-grey (front) to olive-brownish-grey (back). The two main feather pigments involved in this variation are yellow and olive-brown. There is geographical variation in plumage across the four subspecies.

Four subspecies of weebill are currently recognised and exhibit slight variation in feather pigmentation, dependent on distribution. In the south and east of Australia, subspecies occidentalis and brevirostris are light brown; in the southwest, the subspecies occidentalis exhibits greyer plumage; while subspecies flavescens in northern and inland Australia is paler and more yellow. Additionally, the Northern Australian weebills are smaller than those in the south.

They are most commonly found in the canopies of dry, open eucalyptus forests, woodlands and mallee, occasionally coming down to the midstory to feed primarily on small insects and their larvae. They display a preference for foraging in the canopy foliage of healthy eucalyptus trees, where they are more likely to retrieve insects.