What do they look like?
The naturalist John Gould called the malleefowl the 'spotted egg-leaver', a term which describes its appearance and curious breeding habits.
Growing to 55-60cm, with a weight of up to 2.5kg, the malleefowl, (Leipoa ocellata), is a large bird. Its head and neck are buff-grey, while its body is a dappled brown-black and white. It has very keen hearing and eyesight, enabling it to detect dangers well in advance. If threatened it will sneak away, relying on its camouflage. The malleefowl is a strong flyer, but it prefers to run at a fast, lumbering pace if startled.
What do they sound like?
The female malleefowl makes a high-pitched grunt. While in pairs, together they will make a soft, drawn out cluck. To warn other birds of their territory, the Malleefowl will make a loud, booming call. When they feel threathened, they make a sharp grunt.
A recording of a the sound is available on the Malleefowl threatened species profile.
Where do they live?
Although they were originally found widely throughout Australia, malleefowl are now mostly limited to areas of inland semi-arid scrub. They prefer a dry environment with low-growing eucalypt trees and shrubs, referred to as mallee country.
More information about distribution and habitat, including a map of known and predicted distribution is available on the Malleefowl threatened species profile.
What do they eat?
During mid-summer and autumn, malleefowl feed mostly on ants and the seeds of wattle and senna plants. With the onset of the cooler weather and the winter rains, their diet becomes more varied, and they can eat flower blossoms and herbs as well as beetles, cockroaches, other invertebrates and lerp (the sugary caps of sap-sucking leaf insects).
When most animals are sheltering from the blazing heat, the malleefowl is busy moving tonnes of sand and debris to build and maintain a nest mound in which the female lays her eggs. Malleefowl nest mounds can be over 1m in height and 4m across. The male buries wet leaf litter in the mound, which gives off heat as it rots, acting as a natural incubator for the eggs.
Throughout the breeding season, the male has to ensure that the temperature inside the mound is maintained at about 33°C. The temperature is judged by the male putting his head into the mound, and it is thought that he tests the temperature with his tongue. He must then either remove or add sand to the mound, according to the temperature within it and the season.
In spring, much heat is given off by the rotting leaves, and the temperature must be reduced. At dawn, the male digs down near the eggs, and after allowing enough heat to escape he refills the hole with cool sand.
In summer, the male needs to protect the eggs from the heat of the sun. He adds more and more sand to the mound, which absorbs the sun's warmth. Then, in the cool of the morning, he removes the sand and scatters it in the colder air. When the sand has cooled down, he puts it back on the mound.
During the falling temperatures of autumn, the mound needs to be warmed up. To do this, the male digs almost all of the soil away in the morning, spreading it out to be warmed by the sun. Throughout the hottest part of the day, he places hot layers of sand on the mound, so that as the sun goes down the nest has been rebuilt and is warm for the night.
While the male is keeping the temperature of the mound constant, the female is busy laying eggs and helping with the digging. Generally, an egg is laid every 4 to 8 days. A female malleefowl lays between 15 and 24 eggs in a season, though the number will vary depending on availability of food.
The dangerous life of a malleefowl chick
The malleefowl parents rarely get to see the results of their labour, because they abandon the nest and any remaining eggs when the critical temperature of the mound can no longer be maintained. When the eggs hatch, the chicks dig upwards to climb out of the mound, which can take up to 15 hours. They then begin a solitary life, independent of their parents. They can fly within hours of hatching.
Many eggs hatch, but very few of the offspring survive. Relying only on camouflage for defence, malleefowl chicks are easy prey for foxes.
Threats and recovery strategies
Due to the clearance of mallee vegetation (the principal habitat of the malleefowl) and predation by foxes, the malleefowl is now endangered in NSW.
We have conducted surveys into the declining numbers of this species, and is researching ways to reverse the trend. An ongoing recovery program has resulted in the breeding of the first captive malleefowl, in Western Plains Zoo at Dubbo.
Nearly 200 captivity-bred birds have been released into Yathong Nature Reserve, where numbers of foxes have been reduced by broadscale baiting. It is hoped that this release will help make the population of malleefowl more secure. In the meantime, we are continuing to monitor malleefowl mounds and control foxes in the south-west mallee of NSW.