Acacia horned treehoppers (Sextius virescens)

When many of these horny hoppers come together they line up along the stem to imitate a row of thorns.
When really close they latch onto the next member's wingtips with their 'mouth' making the whole line even more sturdy.
The face seems specially shaped for the job. When lined up they seem very confident of their ploy and refuse to flee even when touched. The green and red colors are also a perfect match with the younger stems of these trees.
About 10mm long.
On several young acacia saplings at Mt Morton nature reserve.