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| - It is a large bird with black feathers and a red head. Its total length is about 60–75 cm (23.5–29.5 in) and a wingspan of about 85 cm (33 in). The subspecies A. l. purpureicollisfrom the northern Cape York Peninsula is smaller than the more widespread nominate subspecies. It has a prominent, fan-like tail flattened sideways, and its plumage is mainly blackish, but with a bare red head, and a yellow (in the nominate subspecies) or purple wattle (in A. l. purpureicollis). The male's wattle becomes much larger during breeding season, often swinging from side to side as they run. The males' heads and wattles also become much brighter during the breeding and nesting season. The underside of the body is sprinkled with white feathers, more pronounced in older birds. The brushturkey is a clumsy f
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| abstract
| - It is a large bird with black feathers and a red head. Its total length is about 60–75 cm (23.5–29.5 in) and a wingspan of about 85 cm (33 in). The subspecies A. l. purpureicollisfrom the northern Cape York Peninsula is smaller than the more widespread nominate subspecies. It has a prominent, fan-like tail flattened sideways, and its plumage is mainly blackish, but with a bare red head, and a yellow (in the nominate subspecies) or purple wattle (in A. l. purpureicollis). The male's wattle becomes much larger during breeding season, often swinging from side to side as they run. The males' heads and wattles also become much brighter during the breeding and nesting season. The underside of the body is sprinkled with white feathers, more pronounced in older birds. The brushturkey is a clumsy flier and cannot fly long distances, only taking to the air when threatened by predators or to roost in trees at night and during the heat of the day. They build large nests on the ground made of leaves, other combustible material and earth, 1 to 1.5 metres high (3-4.5 ft) and up to 4 m (13 ft) across. Mound-building is done by a dominant male, and visited by a succession of local females, for mating and egg-laying. The male works tirelessly, collecting material from all around, and also diligently repeling rival males, who are keen to usurp his position. The effort involved eventually wears him down, and he will ultimately be defeated by a new king. The eggs are very large (90mm X 45mm), and the young are fully-fledged on hatching. They can fly within hours, as soon as the feathers are dry. The eggs are hatched by the heat of the composting mound, the temperature of which is regulated by adding or removing material to maintain the temperature in the 33–35 °C (91–95 °F) incubation temperature range. The Australian brushturkey checks the temperature by sticking its beak into the mound. Like some reptiles, incubation temperature affects the sex ratio of chicks, however, the mechanism is different between reptiles and these birds, with reptiles exhibiting Temperature-dependent sex determination (TSD), and megapodes exhibiting temperature-dependent embryo mortality. The sex ratio in brushturkeys is equal at incubation temperatures of 34 °C, but results in more males when cooler and more females when warmer (p=0.035). It is unclear whether the parents use this to manipulate the sex of their offspring by, for instance, selecting the nesting site accordingly. Warmer incubation also results in heavier, fitter chicks (p<<0.0001), but how this is linked to gender is also unknown. The same nesting site is frequently used year after year, with the old nests being added to each breeding season. The average clutch of eggs is between 16 and 24 large white eggs, which are laid September to March. Sometimes up to 50 eggs laid by several females may be found in a single mound. The eggs are placed in a circle roughly 60–80 cm (23.5–31.5 in) down, 20–30 cm (8–12 in) apart, always with the large end up. The newly hatched young dig themselves out of the mound and then have to care for themselves. Brushturkey eggs are a favourite food of goannas, snakes, and also dingoes and dogs though brushturkeys were also a staple of Aboriginal Australians. Often goannas exhibit wounds on their tails from having been pecked by brushturkeys who ferociously chase them away from their nests. In situations where they come into contact with humans, such as picnic areas in national parks and suburban gardens, brushturkeys exhibit little fear and will often boldly attempt to steal food from tables and raid compost bins. They will nest in suburban gardens, and in search of material for their nests will remove enormous amounts of mulch from nearby and neighbouring gardens.
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![[RDF Data]](/fct/images/sw-rdf-blue.png)