Actullay,they do,they don't make any sound,they just open there beaks/bills wide.
but why is the question
Repetetive yawning in birds (most notably Cockatiels) means they are trying to clear their sinuses. Dust, dander, and little pieces of feather or down can get lodged in the sinus cavities, and a bird will yawn to try and clear the passage.
A single yawn however, is just a yawn.
Kris
Birdiemovers
yes they yawn quietly
"Yawned"; "yawn" is a regular verb.
The word 'yawn' is both a verb (yawn, yawns, yawning, yawned) and a noun (yawn, yawns). Examples:Verb: I began to yawn in the middle of the lecture.Noun: The comedian's joke met with a big yawn.An adjective is a word that describes a noun, for example: a big yawn.
Yawning is contagious.
No, dogs do yawn too. I hope some other animals also yawn.
Lack of oxygen to the brain causes an involuntary reaction that we know as a yawn.
the homophone for yawn is.............you! haha get it lol
No whales do not yawn.
Yes, yawn is an onomatopoeia.
yes they yawn quietly
"Yawned"; "yawn" is a regular verb.
The typical written expression for a yawn sound is "ho hum."
Insects do not yawn. People necessarily do not yawn only when they are tired. Most people, after reading this, will yawn.
A yawn is normally a response to a change in activity, although if you did not get enough sleep, you could become tired and yawn.
The word 'yawn' is both a verb (yawn, yawns, yawning, yawned) and a noun (yawn, yawns). Examples:Verb: I began to yawn in the middle of the lecture.Noun: The comedian's joke met with a big yawn.An adjective is a word that describes a noun, for example: a big yawn.
Yawning is contagious.
to yawn is 'bailler' in French.