Delma-Ioprey is a large Bird Wyvern that has only been featured in the MH Orage manga.
Its body resembles that of a falcon or eagle.
It forms a petrifying saliva that it can throw at enemies and has a breath that crystallizes its enemies into glass or dulls the hunter's weapons immediately.
- It has thin and fleshy skin on the throat area, making it its most weak spot. Huge damage is done to this area with Pierce bullets from a Bowgun. 
- The materials of the Delma-Ioprey are dark and glittery. 
- Despite its name, it has no known relation to a monster of a similar name, Ioprey, apart from both being in the same Bird Wyvern monster type.
- Its name is most likely a result of an interesting/'mis'-translation. The Japanese name of Ioprey and Delma-Ioprey are respectivery 'Iosu' and 'Derumaiosu'. The translators might have taken this sort of approach to the name.