That is an interesting picture, GT'. The E266 prototype Foxbat had larger tip tanks and downward pitched single fins on their outsides. This pictured machine looks like a modern photo, and the windscreen is different, no circular forward brace at all, rather more like a Mig 29 canopy and there are some chines that are not completely like the Foxhound's (and no second cockpit!) but the landing gear is Mig - 31, plus those wingtip devices are mysterious. And a retracting IFR probe as well. Its not a 25, but not quite a 31 either.
You may have a mystery ship on our hands.