Aboriginal didgeridoos are made in the traditional communities in Northern Australia or by makers who travel to Central and Northern Australia to get the materials. They are usually made from hardwoods, usually eucalyptus species that are native to the area. Sometimes a native bamboo, such as "Bambusa arnhemica", or pandanus is used. The main trunk of the tree is used, though a big branch may be used instead. Aboriginal makers spend a lot of time looking for a tree that has been hollowed out by termites. If the hollow is too big or too small, it will make a poor quality instrument.