This is a freshwater bug named for its resemblance to scorpions, but it totally unrelated.
Not usually one we would find in the garden as they are aquatic.
This one appeared after we had a flood.
Adult size: 60 mm
Out and about
Reproduction and Life cycle
To deter
To control
Plants to repel
Plants to attract
Predators
Why they are Beneficial
They are a predatory bug, feeding on worms, insect larvae, tadpoles and small fishes in the water.