I find grasshoppers reasonably easy to photograph as long as the weather is fairly cool and/or it is early in the morning or late in the evening. Some grasshoppers will simply jump away as soon as you approach but, if you're careful and move slowly, others will be surprisingly confiding. After a few unsuccessful attempts with uncooperative grasshoppers, the individual below posed nicely for me for a few frames (as ever, I then let it go about its business).
These images are of Common Green Grasshoppers (Omocestus viridulus):
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