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A fleshy or waxlike membrane at the base of the upper beak in certain birds, such as parrots, through which the nostrils open.
cerethat portion of the base of the upper mandible of the bill in birds which is swollen and appears waxy.
the firm, fleshy bond lying across the base of the beak of birds. Most obvious in the pigeon as a white, saddle-like object. The cere is blue in male budgerigars and light brown to pink in females, so offering a convenient means of sexing these birds. The color may fade in males with testicular tumors.
occurs in psittacine birds, particularly budgerigars; overgrowth may occlude the nares. Called also brown hypertrophy of the cere.