Crotalaria cunninghamii, also known as Green Birdflower or Regal Birdflower, is a plant of the legume family Fabaceae. It is native to, and widespread in, inland northern Australia. It is named after early 19th century botanist Allan Cunningham. It is a coloniser of unstable sand dunes, along beaches and in Mulga communities. It is pollinated by large bees and by honeyeaters.