Branta

Information
Branta arizonansis is a large goose, with a torso as wide as a small car, and growing several feet in length, descending from today's Canadian Goose. It is in competition with the late hominid and basal synapsid dinosaur Parapithecus, occasionally getting in fights with them to protect their nests from raids. This member of the genus Branta is able to efficiantly conserve energy during its seasonal biannual migration and has been known to travel as far South as northern Mexico during the winters.

Design
Branta arizonansis has a broader skull than its ancestors, with appendages jutting out on the lower jaw that appear to be cheeks. These have no known function besides for display and additional muscle attachments. This goose lacks sexual dimorphism and has a similar pattern to its ancestors, besides for having its white around the sides of its face instead of the back of the head.