The present study was carried out on three different birds. The mouth and pharynx of all three birds lack a definite line of demarcation. However, in chicken, the mouth and pharyngeal cavity was well demarcated with dark red colour bands which was absent in Turkey and Japanese quail. The beak had broad base with pointed tip and slightly curved appearance in Turkey and strongly curved in Chicken and Japanese quail. Beaks of all three birds were covered with horny sheath. The roof of the oropharyngeal cavity was formed by the hard palate which was elongated, cream-coloured with some black patches in all the birds. The roof of the oropharyngeal cavity was more concave in Chicken than Turkey and less concave in Japanese quail. In Turkey, the median ridge was a continuous smooth line in cranial part but discontinuous line in the caudal part with 3-5 papillae was observed. However, in chicken, a single continuous part without any papilla was identified. In Japanese quail it consisted of only continuous cranial part. The two lateral longitudinal palatine ridges were observed. Choanal slit was consisted of a narrow cranial part and a broad caudal part. The infundibular slit was a continuous slit from the choanal slit to laryngeal inlet. The tongue was observed triangular shape in all these three birds. The filiform papilla was found caudal to the root of the tongue in all the birds. These mucous swelling were separated by a median ridge.