* Their nostrils are their primary breathing apparatus: Birds have nostrils located on their beak that are designed for efficient air intake.
* Mouth breathing can be inefficient: Birds have air sacs in their body that help with breathing. Using their mouths to breathe can disrupt the flow of air through these sacs.
* Mouth breathing can be dangerous: Birds can aspirate (inhale) food or water into their lungs if they breathe through their mouth, which can lead to respiratory problems.
While birds might occasionally breathe through their mouth, especially if their nostrils are blocked, their primary breathing mechanism is through their nostrils.