This mod adds spawns for the Desmodus on all maps. It uses the piggyback system for spawning and is set up to spawn the Desmodus instead of the Onyc with a 10% chance. It uses the vanilla Desmodus, with no changes at all, and just adds the spawn entry. You also do not need to own the Lost Colony or Astreos DLC as it is a vanilla dino which will come to all ARK players when Fjordur Ascended releases.
To see where it might spawn, check the spawn locations of the Onyc for the map you're playing on here: https://ark.wiki.gg/wiki/Onyc
Image comes from the original Desmodus draculae info sheet by Zorafoxx.
Discord: https://discord.gg/BZbEbVSxqb