Blizzard replaced some UI assets for Horde players in Dragonflight.
Specifically, gryphons on the action bar have been replaced with wyverns for Horde players. The new action bar art thematically fits the Horde better. Below, we include a screenshot of the new element.
Here are the game files associated with the new action bar assets if you’d like to see them in higher resolution.
Before (Dragonflight Beta Build 45480)
After (Dragonflight Beta Build 45569)