
The year is 1959. Speleologists descend a 17-metre shaft to explore the depths of Mairs Cave in the southern Flinders Ranges. Some 55 metres into the main chamber, they find fossils scattered throughout a boulder pile. Among these fossils are a claw and part of a wing bone that appear to have come from a large eagle.
Over a decade passes. An expedition to the cave, led by naturalist Hans Mincham and palaeontologist and geologist Brian Daily, now arrives with the purpose of retrieving more fossils. Among the many mammal fossils they recover are another talon and most of a large bird breastbone – from the same large eagle.