This family group of beautiful but threatened Forest Red-tailed Black-Cockatoos (Calyptorhynchus banksii naso) are perched in a Marri tree (Corymbia calophylla), a type of eucalypt. The adult birds were feeding on the green fruits, also known as gumnuts with their strong bills, while the immature perched nearby, calling incessantly. The female has a whitish bill with pale yellow spots on her head and wings, an orange barred tail, and is easily distinguished from the male that has a dark grey bill, all black feathers and solid red tail feather panels. The juvenile’s plumage is similar to the female’s. Forest Red-tailed Black-Cockatoos are large (53-55 cm), long-lived birds that live in family groups or small flocks. About 90% of their diet is Marri seeds and Jarrah (Eucalyptus marginata) fruit, with a variety of seeds of other hard-fruited species being taken less often. They nest in large natural tree hollows that form mainly in Marri trees that are more than 200 years old, so suitable nest sites are always in short supply.