Big Claw! Spoilers

He can "hide" pretty good. Imagine the game's original version of Sideshow Bob running behind and through buildings. Big Claw does the same when running, walking or standing. You have got to be willing to use your filters (he may be standing "inside" a building.)

I suspect I'll spend a few days tracking him down to see what it takes in time and effort to complete the allotted 3 taps/day, but if it goes like I think it might I'll probably just tap Big Claw when I happen to see him