tweet!tweet!
Tweet! Tweet! is not a Palindrome. The word tweet is not spelled the same both forwards and backwards.
It depends upon the bird. Eg. A sparrow tweets or chirps, a crow caws. an owl hoots etc.
bird sound is called called churping
Bird song
A bird whistle
"Peep" is a palindrome often used to describe the sound of a baby bird.
tweet tweet
they sound like a bird
bellbirdbell bird
kookook bird
Doves and sometimes pigeons make a sound close to that description. Owls make a sound similar, but their call is more of a 'hoo' sound or 'hoot.' If the bird makes a 'cuckoo' sound then it is a cuckoo bird.
a pukeko
An owl.
peep