Grasshopper

Grasshopper

Observation - Grasshopper - Global. Description: Huge grasshopper, about 7cm long including the closed wings. They fly in a kind of whirring flight. What are the spines on the back legs for?

Huge grasshopper, about 7cm long including the closed wings. They fly in a kind of whirring flight.
What are the spines on the back legs for?