A cere is a fleshy, often waxy area above a bird's beak.

Budgerigars are dimorphic because the males' ceres turn bright blue upon maturity, while the females' ceres turn tan. The female budgies' ceres also appear wrinkled, to a greater extent during periods of fertility.

Immature budgies have pale pinkish ceres which are smooth and shiny.

The nares are set within the cere.

External links: Photo of a male budgie's cere (http://www.justbajan.com/pets/birds/species/budgies/male.jpg)