Crystal Wyverns drop Bio-Crystal instead of feces. Bio-Crystal is identical in structure to regular Crystal, so it can be used to craft anything that would otherwise, take Crystal. As an organic compound, Bio-Crystal has a spoil time, and when it is spoiled, it turns into regular crystal.

Consuming Bio-Crystal will heal a small amount of a character's health instantly, and it will also remove any buffs that cause slowing effects(using them has a cooldown).

Wild Crystal Wyverns can only be passively tamed by offering them a small amount of Bio-Crystal.

Crystal Wyverns are skittish in nature, so in order to get close enough to be able to tame them by giving them Bio-Crystal, you will need a repellent which is stronger than regular repellent, like the Bio-Repellent which can be found in this mod. https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=827011350

Crystal Wyverns will spawn with color set that will vary depending on the temperature of the zone that they spawn in.

Crystal Wyverns can mate and lay eggs, just like any other Wyvern.