Correct – it’s a White-winged Chough nest, one of the best I’ve ever seen.
Remarkably it’s in perfect condition, despite falling from its support, a eucalypt bough in the canopy. Choughs return to old nests, adding extra rims of mud over time – this one appears to have been refurbished at least twice. The inside of the nest has been lined with grass and finely shredded bark, to produce a cosy bowl for a new family. The fresh appearance suggests its fell before the eggs were laid, or at least early in the incubation phase.
The nest, found by Elliott Pearson of Campbelltown, was thoughtfully donated to the Newstead Primary School in 2014.