Sulphur-Crested Cockatoo

Sulphur-crested Cockatoos are one of Australia's most recognisable and widespread parrots. Their loud calls can often be heard long before they come into view, as they use vocalisations to communicate with other birds over distance. As captured in the above photo, their expressive behaviour also makes them fascinating to observe, with their striking yellow crest being raised and lowered during different social situations.

Physical Appearance

Adult Sulphur-crested Cockatoos are predominantly white, with a bright yellow crest that can be raised dramatically. Their wings and tail also contain pale yellow feathers, which can be seen more clearly when their wings are outstretched or during flight. Males and females look very similar, although females generally have a red-brown iris while males have a darker brown iris.

Their large, powerful bills need to be regularly maintained. To help keep them trimmed, they regularly chew branches, wood and other tough materials. Their strong bills are also important for feeding and climbing.

Habitat

Sulphur-crested Cockatoos inhabit a wide variety of environments, including forests, woodlands, wetlands, farmland and urban areas. They have adapted particularly well to towns and cities, where they are commonly seen in parks, gardens and streets lined with mature trees.

Behaviour

Social Birds: These highly social birds are often seen in pairs, family groups or larger gatherings. They form strong family bonds, with young birds remaining with their parents and learning behaviours from older birds.
Communication: Their loud, far-carrying calls help birds communicate and maintain contact over distance. They also use body posture and their raised crest as visual signals during social interactions.
Intelligent Birds: Sulphur-crested Cockatoos are highly intelligent and capable of learning new behaviours from one another. In some Australian cities, they have even learned how to open household wheelie bins to access food, with the behaviour spreading between neighbouring birds.
Chewing: Their habit of biting and stripping branches may look destructive, but chewing also helps maintain their bills. Their powerful bills allow them to manipulate food, climb and break apart tough plant material.
Feet: Like other parrots, they have two toes pointing forwards and two backwards, giving them a strong grip. They can also use their feet to hold and manipulate food while feeding.
Roosting: They generally remain within the same broad area throughout the year, although they may travel considerable distances between feeding and roosting locations. They often roost together in trees.

Breeding

Nesting: Sulphur-crested Cockatoos nest in tree hollows, particularly those found in large, mature trees. Both parents participate in preparing the hollow, incubating the eggs and caring for the young.
Breeding period: In southern Australia, breeding generally occurs from August to January, while in northern Australia it occurs from May to September.
Hybridisation: Sulphur-crested Cockatoos have been recorded breeding with Galahs, producing hybrid offspring.