01/05/2026
Lakota shows off his healthy choanal slit and healthy choanal papillae. Here are some facts👇
The word choana (plural: choanae) originates from the Ancient Greek word χοάνη (khoánē), which means "funnel" or "funnel-shaped opening".
The choanal slit as you can see is a long, narrow slit in the roof of a birds mouth, located midline between the hard palate and the pharynx.
It connects the nasal passages (nostrils) and sinus to the oropharynx
Function of the Choanal Slit
1. Respiratory Connection:
It allows air to move from the nostrils through the nasal cavity into the trachea.
Birds breathe through their nostrils (nares), not their mouths, under normal conditions.
The choana is essential for nasal breathing.
2. Mucus Drainage:
It helps drain mucus or debris from the nasal cavity into the throat where it can be swallowed or expelled.
The choana in birds of prey is a longitudinal, V-shaped slit located on the roof of the mouth (hard palate) that connects the nasal cavity to the oral cavity, facilitating breathing. Unlike mammals, birds lack a soft palate, making the choana a critical, direct passage for air to pass from the nostrils (nares) into the trachea.
Anatomy and Function in Raptors Respiratory Connection: The choana acts as part of a continuous tube from the nares to the trachea. When the bird’s mouth is closed, the glottis (opening to the windpipe) fits directly into the choanal slit, allowing it to breathe without opening its mouth.Choanal Papillae: The edges of the choanal slit are lined with fine, sharp projections called papillae. These act like sensors and help maintain proper air movement, with their appearance also often indicating the nutritional status of the bird. Species Variation: While parrots have a wider V-shape, the choana in most raptors (such as hawks, eagles, and owls) is typically narrower and more slit-shaped.
Eustachian Tubes: At the caudal (rear) edge of the choana, the infundibular cleft connects the mouth to the middle ear. Malformations of the choanal papillae may mean a deficiency of Vitamin A.