The ovipositor of the sawfly (Philomastix xanthophylax). It looks a bit like a drill. The eggs can be seen under the leaf. After making dozens of holes she looks exhausted. It's hard work pushing eggs through a tiny hole in a leaf. Oxley Creek, QLD.
Philomastix xanthophylaxdrillingeggegg layingeggsgreen leafholeshymenopteramacro photoorangepale greenred ash sawflysawflyyellow