I have plans to do something about this in the future. For now if you want you can add them to the server's beacon loot.

OK awesome :) sorry to sound n00b but as I have only been running my server for 2 weeks how would one go about doing that? Is it a line that has to be added to either the GameUserSettings.ini or the Game.ini? I have Beacons 2.0 mod added to my server so not sure if that would effect it or not?

That mod would affect it, I'm not sure if you can customize the drops with that mod, but you can edit the ini file to add it to the vanilla beacons. You can just google search ark custom beacon loot to find out how to do it.

That would add rock drake saddle to red beacons on The Island. Doesn't replace standard loot, so might not get is as often. Anywho, I've been using Beacon to add stuff to beacon loot. Nifty tool!

https://beaconapp.cc/
Currently it doesn't have the setting to add rather than replace, but you can "easily" add that in there manually (bAppendItemSets=true). Might need to play around with quality settings, etc. Goes in Game.ini yes. But a mod might override whatever you have in Game.ini...

ah brilliant, yeah I found Beacon when I did a google search and did think that perhaps Beacons 2.0 may override anything that I put in. I do have an Aberration server clustered with the Ragnarok one and the host has symlinked the game.ini and GUS.ini files so I have to try and work out how to amend/add the lines so both maps are taken care of in one file :/ Thank you so much @Arksanity and @darklore for your help - it's nice to finally have helpful people than the crap I had to deal with, with the Rust community.

These are the same ice wyverns as the ones on ragnarok.

https://d1u5p3l4wpay3k.cloudfront.net/arksurvivalevolved_gamepedia/thumb/b/ba/Ice_Wyvern_PaintRegion2.jpg/400px-Ice_Wyvern_PaintRegion2.jpg

That's something that google would know.

If they naturally spawn in then they will still spawn, if you are trying to add spawns then you need to place down the spawners and set them up.

If they don't spawn there without this mod, then they won't spawn there with this mod. You have to place the altar down and set up spawns.

This mod ONLY spawns creatures from the altars you place.

No, they have to be admin spawned.

The wyvern altar spawns all 4 varieties of wyverns.

Click the link in this mod's description.

Yes, unless you have Classic Flyers or Extinction Core.

Nope, but my other mod spawns almost any creatures that you could want: Simple Spawners