Where is the cere on a bird?

Excuse me, but I'm a bit confused by the phrase "cere on a bird." Could you possibly clarify what you mean by "cere"? In ornithology, the cere is a usually brightly colored, horny, sometimes scaly area surrounding the nostrils of birds. If that's what you're referring to, the cere is located at the base of the beak, just above the nostrils, and serves a protective function. Is there a specific aspect of the cere on birds that you'd like me to elaborate on?