This icon stands for Baldur's Gate: Enhanced Edition without Siege of Dragonspear installed
In Baldur's Gate II it can be sold to stores, but there is nobody who collects wyvern heads or uses it to make something. Wyverns which are summoned by the 6th level wizard spell Wyvern Call will drop this item if they are slain.
It weighs 30 pounds.
|“||The severed head of a wyvern is both a fearsome and a reassuring sight. Gruesome as its fanged maw and blazing eyes may be, there is consolation in the knowledge that they can be conquered by mere and lowly mortals.||”|