When u find a reaper if u want a easy way to get pregnant make a trap with foundations and pillars after you get it under 2k hp it will glow pink if you use a drake or megalosaurus then hop off out of biting distance of the reaper qait about 2-3 seconds until its looking at you and hop back on your tame and it will grab you and impregnate you since there are foundations the reaper will not bury itself this can be used to get multiple for your tribe or anyone after impregnation is done take a gun preferably a shotgun turn your light on and kill it with a gun or crossbow or whatever your using this will give your character the levels for the reaper caps at 75 btw you have to kill it with your character if you use a tame you will not get very much exp.
I suppose it's a glitch, because Wiki says the opposite, but apparently can get 50% cowardce from one roar of Yuti. Well, Ark, you are glitched for good! Otherwise how could you explain that my friendly meeting with Yuti on Extinction ended up almost scaring the new baby Reaper out of my own?
P.s: never got it again for some reason. Another reason to believe that it was a glitch.
Reaper queens are weak the only thing they have going for them is hp and torpor damage. But they are easily killed with tamed spinos they don't resist damage they just have crazy hp regen when not under charge. So bring a charge pet which you should already have if you're venturing into the purple.