👉 The Thornbills (also known as the Bluebell or Bluebell Sparrow) are a small, medium-sized bird species found in Australia. They are characterized by their distinctive blue and black plumage with a white stripe across their back. The Thornbills have long, curved bills that they use to catch insects, and they can be found throughout most of Australia's temperate rainforests, as well as on the coast.