Bush chickens are a species of small, flightless birds, found on Azeroth. Following their introduction to the mainland by the goblins, bush chickens have become the entrée-du-jour for Pilgrim's Bounty due to their high deliciousness and low intelligence.[1]
This article or section includes speculation, observations or opinions possibly supported by lore or by Blizzard officials. It should not be taken as representing official lore.
They are presumed to be related to normal chickens.
Ash Chicken in Searing Gorge
[Frightened Bush Chicken] has a chance to drop from 
Bush chicken playing a troll guitar in hopes of spare change in Mistfall Village