I've had a level 540 one spawn on the viking beach...

the volcano, the wasteland near Viking, anywhere there is a low enough number of dinos.

I see them a lot at the bottom of the huge quad waterfall in the upper middle of the map.

I find entirely too many of them in the mountains to the west of the desert region, in the south-east. Getting my friend a tamed one was a task and a half because of the number of them.

lol, with a decent enough mount, you won't need to worry, just get one to 'infect' your friend and then wipe out the Reapers.

Anywhere that argentavis also spawns. The northern edge of the desert tends to have tons.

Found three reaper queen on 80 - 40 on the south of the map longsaide of the beach, but it appears they got the same spawn as argentavis :)

yeah, mountainous regions spawn Reapers

wow thanks for the info guys wasnt sure where to find them also read somewhere that there is a metal cave in the desert that spawns them too but this could be a rumor but otherwise thanks for making this discussion and letting others know of the general vacinity of the reaper spawns. gg all and have a great game