SPECULATION - ALL OR NOTHING GAMBLE
This beetle is a pollinator of the Prasophyllum alpestre.  It pushes its head into the flower in an attempt to find the nectar.  (see photo above)

As it withdraws, the pollinia still attached to the strap (stipe) is stuck to its head.  The stipe is very flexible and bends as required for insertion at the next flower. (see photo below)

The beetle leaves one flower and proceeds to the next flower for a repetitive action.  (see photo above)

A close-up photo of the pollen packet demonstrates how it is beginning to come apart.  This is most likely due to the loss of contact to the plant and the deterioration of the viscin - the material which binds the pollen together. (see photo below)

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