The ostriches are what the bald eagles turned into during the events of Bald Eagle Castle. It has never been specified if real ostriches live in Hidden Kingdom, as none have appeared, though it seems possible that they do, as a name existed for them already.
The ostriches have squarish heads with curved beaks. They have long necks due to being pulled out of the ground by the Zebra Brothers in Bald Eagle Castle. They also have rounded bodies, possibly because they gained weight after being unable to fly due to their stretched necks.
- The ostriches are nothing but bald eagles who got their necks stretched after being pulled out of the ground. They are one of four forms the eagles have had so far.