This applies to Ragnarok only:
On the far west side of the Wyvern Trench there are usually an egg or two in the first couple of holes in the wall.
The coordinates (47.0, 51.4) (42.7, 55.4) (44.4, 58.8) and (33.5, 66.8) contain Ice Wyvern eggs. I can confirm the first and last have eggs, while I have only heard that the other two contain them.
The wyvern is a lizard of the air,
To tame it's fury,
You must enter their burning lair,
It has three kinds: one's stormy one's toxic and one's fiery,
To enrage them is a deadly thought,
But if successful will not amount to nought,
If you find the glowing stone,
From Inside will come flesh and bone,
And lightning, venom, or fire,
But do not sink into the burning mire,
To get this treasure,
It does not bring pleasure,
It enjoys a nest of burning flame,
And milk of the beast from which it came,
But if you manage the impossible feat,
The wyverns's fury is now yours to tame,
If you hatch wings of thunder,
Your aim may often blunder,
But with its power,
It could topple the highest tower,
If you hatch wings of acid,
Your shot may miss,
But after that the air is no longer placid,
If you hatch wings of fire,
Your range is weak,
But your power is dire,
There are more than one type of wyvern, they are fire, poison, lightning, and soon to be a Crystal Wyvern with the Crystal Isles free DLC coming, they are going to be a passive tame. The types of Crystal Wyverns are base, tropical, blood, and ember.
The wyverns spawn in wyvern dens, and can be found in the Highlands for Ragnarok and the Snow Desert in Valguero (I only do free DLCs).
You tame wuverns by going into the wyvern dens and finding nests with eggs in them. Once you have an egg, they need 10-15 standing torches, 4-5 fireplaces, or 20 (atleast) campfires. Until they are adults, they need Wyvern Milk to survive. That is all they eat until then.
Wyvern milk can be obtained by knocking out a female wyvern and collecting milk from there. Alpha wyverns drop more than normal wyverns.
Wyverns pick up larger dinos than other flyers.
Wyverns can breathe fire for fire wyvern, lightning for lighting wyvern, and poison balls for poison wyvern.
Ice Wyverns spawned at the beginning of my Ragnarok world in specific locations. Took two eggs from two different locations; wyverns guarding both.
Went back in-game days later...wyverns disappeared, nests are completely gone. Someone help