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I'd give him a .000001% chance of being the actual photographer ;) Looking at post history is a very good indicator. 2nd is if an image is plastered across the net, and the guy isn't a professional photog like we have with scotphoto (forgetting his exact handle, the real photog from Tahoe, and others) :)

You're probably right. The particular image seems to be curtesy of that guy here: https://500px.com/photo/82693769/chiang-mai-rice-field-by-sarawut-intarob?ctx_page=4&from=user&user_id=519613