Dododex
ARK: Survival Evolved & Ascended Companion
They spawn most commonly in the swamps north of the southern islets connecting…

They spawn most commonly in the swamps north of the southern islets connecting to green ob, spawn slightly less commonly in the western swamp marshes, then spawn least common in the main writhing swamps south of the redwoods.
More Rhyniognatha Encountering Tips
Don't forget you guys, we can craft insect repellent to appear invisible to these guys!! This trick also works for taming Scorps or Spiders with rotten meat. Bump it to the top for those who are rusty!
If you’re trying to find it in Ragnarok (Mobile) they don’t exist there.
Pro tip: NEVER under ANY circumstances fly a PT anywhere NEAR the swamp. Dododex says they are rare, but you can get four swarming you at once. This will save your life, controller, and pt.
I was just flying near the redwoods to looks around when one of these freaks pulled up on me and my pt. I didn’t realize they were in the new mobile version so I screamed and tried to run away (it caught up) and I had to dismount my pt and run for it. DO NOT GO NEAR ANY SWAMP UNLESS YOU’RE PREPARED. THEY ARE SCARY.
Only spawn when you don’t want them to
Rare??? My ass rare... They spawn in 3-5 stack literally in redwood around swamp area... Yeah they have alreay eaten around 17 pteranodon, 1 iguana, 1 trike, 20 human and lots of my stuff hardly crafted and looted.
rare my ass, these annoying buggers are everywhere near the swamp
In ark mobile edition dont wander in swamp with a flyer they spawn in a pack and will destroy your pt/argy
you can find them the most near the redwoods and the swamp on like that little beach at least on the map the island you can find it on that beach but other than that, I don’t know where to find any sometimes you can find them in like the actual swamp, but it’s very hard to do this so so I just look on that little beach
hope this helped
So basically the swamp is a no fly zone like the redwoods all because of these oversized locusts. They somehow fly faster than a pteranodon and can shoot sap. Learned it the hard way twice by losing 2 tamed high level pteranodons.