@loren I have Australia's largest bee for you: Megachile monstrosa.

Marked as sensitive as it may appear scary, but this solitary bee uses her huge mandibles to dig a nest in solid wood.

In the last photo, you can see her enlarging a knot hole while a gasteruption wasp (parasitic) waits for an opportunity to lay her egg on the bee's egg. Wood shavings were falling on me as I took this photo from below.

#WesternAustralia #Bees #Megachile #Gasteruption #Wasps #Parasitic #Nesting #Nature