To the guy with the blood wyv looking for the ice wyv, yes, ice wyverns are still tamable.
However, NESTS ARE NOT GURANTEED TO SPAWN. You'll need to look at the multiple different spawn points for nests, and hope a nest spawns. I'd recommend using the Ark Wiki's list of nest spawns, they are usually listed on the "Resource Map". If you've checked all locations and they still haven't spawned, kill the ice wyverns and then fly far away to unload the zone, and come back to reload it. I personally, however, would not recommend getting an ice wyvern at all, as they are widely considered the worst wyvern type. Go for Lightning or Poison instead!
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.