Aak grasshopper, Poekilocerus pictus, Pyrgomorphidae

Found in South Asia, the Aak grasshopper is especially known for its nymph, which squirts a jet of defensive fluid several inches when grasped by a predator. The liquid is foul-tasting and contains cardiac glucosides, which can be toxic in the right amounts. Photos 8 and 9 show nymphs.

Photo 1-3 by rameshshenai, 4 by subhajit_roy, 5-6 by azazahmad, 7 by udayagashe, 8 by atal_wildman, and 9 by anil_kumar_verma