 The central nests were composed of 230 to 360 soft stems from grass species "Stipa elegantissima", the maximum length at 20 cm and progressively shortening to 5 cm at the interior.The lining contained over 300 feathers from a rosella ("Platycercus icterotis") that had died in the vicinity, along with large amounts of downy plant material.This brought the total number of items delivered and assembled to over two thousand.