Great Carpenter Bees
The 15-24 mm Great Carpenter Bees are the largest bees in Australia! They cut nest burrows in soft timber such as dead limbs of a mango tree.
The females (see photograph "2008 Peter O") have glossy black abdomens and bright yellow waistcoats.
The males of the Great Carpenter Bee have quite different colouring. They are covered with soft golden fur. ("2010 Peter O")
Many thanks to Aussie Bee and Peter O