Binjied Bard?

[Crinia]

A Word from the Bards - Henry Lawson

"IT IS New Year’s Day and I rise to state that here on the Sydney side
The Bards have commenced to fill out of late and they’re showing their binjies with pride
They’re patting their binjies with pride, old man, and I want you to understand,
That a binjied bard is a bard indeed when he sings in the Southern Land,
Old chaps,
When he sings in the Southern Land." ...

Question: what is a binjied bard? Most probably Australian Slang but I can't find a meaning for the word binjied

Crinia