The western spinebill (Acanthorhynchus superciliosus) is a honeyeater found in the heath and woodland of south-western Australia. Ranging between 12–16 cm long, it weighs around 10 g. It has a black head, gray back and wings, with a red band behind its neck and from its throat to its breast. Its curved bill is long and slender.
Like other honeyeaters, the western spinebill feeds on nectar. It tends to obtain its nectar from lower shrubs than most other honeyeaters, including Banksia, Dryandra, Grevillea, Adenanthos, and Verticordia. It also feeds from trees of Banksia and Eucalyptus, and from herbs such as Anigozanthos. In addition to nectar, it feeds on insects that it captures in the air or on plants.