Cockatrice

Cockatrices are apparently small chickens found on Azeroth, thus far only represented by the Pygmy Cockatrice.

• In classical representations, cockatrices look like a mixture of a rooster and a dragon or snake, as seen in the picture to the right. Between Blizzard's tendency to put their own spin on myths and traditional fantasy — and the high elven love of grace and beauty — it is no mystery why these scaly monsters were reinvented for their new incarnation.
• Depending on which source is used, the cockatrice is sometimes another name for the basilisk.
• "Cockatrice" was going to be the name for the blood elf racial mount, now known as the hawkstrider. Hawkstrider icons (for example, Ability mount cockatricemount.png) still use the term in their filenames.

This may be the Darkmoon Faire's attempt at passing an ordinary chicken off as the more traditional mythical beast.