A parakeet’s cere is the fleshy, waxy membrane above its beak. In young parakeets, the cere is typically light blue or pink. As the parakeet matures, the cere will gradually turn brown. This is a normal part of the aging process and is not a cause for concern.
However, if the cere turns brown suddenly or prematurely, it could be a sign of a health problem. Some possible causes of a brown cere in parakeets include: