I don't know! It's less than a cm long and I keep seeing them in the long grass. The nearest I can find is that it seems to be similar to a Conehead Cricket, but all the ones I have found online that look like this are much bigger so it is probably a nymph. One of life's mysteries I guess!
So well camouflaged I am surprised you see them Agree wit the nymph idea, the legs are not developed enough to do a cricket song. Whatever it is beautiful*