Unfortunately I don't have a screenshot, but I've caught one before. They are very, very rare and you can only find them from 11 pm-7 am. I've only caught about four in my five years of playing WW. They do look like regular stag beetles, but they are bigger. I used to catch every stag beetle just in case it was a giant stag, but when I actually dig catch one it was noticeably bigger. You can tell the different between a stag and giant stag is what I'm saying. And the horns are wider apart.