Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 117773 Wings, Dragon, Yellowish Green, Olive Green and Dark Green Scales, Sand Green Edges Print [Complete Sheet] this part is a sub-part of it
• 117773a Wing, Left, Dragon, Yellowish Green, Olive Green and Dark Green Scales, Sand Green Edges Print this part is a pair of it