Chocobo

What looks to be an exceptionally athletic chicken the size of a draft horse and with golden-yellow feathers stands before you. With a pair of sharp talons, it scratches at the ground as its head darts about alertly. Upon noticing you, it tilts its long neck to one side and lets out a curious call, "Wark?"

Chocobos are large animals that look like crosses between oversized chickens and ostriches. With long necks, these horse birds can often be found running freely in flocks across great plains or lazing in cool shade of isolated forests. Natural runners, few creatures can sprint as fast as a chocobo without the aid of magic. 
An average riding bird stands nearly 7 feet tall and, with it's flared tail plumes, is almost equally long. Despite their size, chocobos are still avian and usually weigh only about 350 pounds.

Combat chocobos are usually either shy or friendly, and thus don't often engage in combat. Most potential predators leave chocobos alone in favor of slower prey. However, when a chocobo's young or those it becomes attached to are in danger, it makes effective use of its sharp beak and powerful talons.

Black Chocobos Far more rare than the standard yellow-feathered chocobo is the nearly mythical black chocobo. Said to lurk only in the most secluded mountain forests or born by chance from the controlled breeding of thoroughbreds, black chocobos are one of nature's most prized treasures. 
Black chocobos have the exact same stats as standard chocobos, as well as a fly speed of 90 feet. Black chocobo usually sell for 2,000 gp on the open market.