This is one of the best tames in all of ark! It is the only flyer that can go in caves it has night vision it can go invisible and it has echolocation. It can get blood packs very easily. And it is the only way to craft sanguine elixer which can give an automatic 30% to either taming or imprinting ( note it can only be used once per imprint/tame) it also has a life steal effect and you can shoot while riding. It is also fast and has a dive ability kind of like the snow owl it can land on walls and roofs and also it has decent health and melee. Definitely worth the tame!

Up for Real picture (these words are just so i can submit this)

You can STEAL WYVERN eggs using the invisibility ability at night up

You should tame a low level first get tons of blood packs then tame a high level

THE ELIXIR IT MAKES DOES WORK ON PASSIVE TAMES!!! You just have to feed it the required food first and then you can use the elixir! Up if this helps for shadowland taming!!!

They also spawn in the cave near the emerald trench.

Lat: 68.2

Lon: 37.3

Babies CAN EAT MEAT as a baby to raise them.

In Fjordur the spawn locations are :

Latitude:38 Longitude:75, inside a cave under a waterfall

Latitude: 90 Longitude: 78, cave as well

Latitude: 50 Longitude: 14, cave

Use a Daedon, put meat inside, set to passive, passive healing on and kill all the other desmodus until there is only one, then duck under the Daedon and the desmodus will grab it, suck it's blood and the effectiveness will go up 3-4%, don't leave the area, hide and wait until 100%. Once 100% effectiveness, let it grab you (make sure you have 150-200 blood packs) and you'll tame it. Use cryopods if possible to bring back the Daedon.

Up, so that Devs implement the Sanguine Elixir in the app like on the webpage.

One of the comments suggest using snow owl to get blood for first one. Not bad, but every time you heal using owl, it’ll go through your meat. If you can make med brew.