The term implies something that feels like "dodo" or imbecile.
Corvids and parrots and raptors are remarkably smart, yet not every bird species is. Some are incredibly stupid.
There's also the anecdote (maybe just in the American South?) of a chicken running around with its head cut off.
Also think of the "Always Sunny" meme where they call Dee a "bird" all the time [1]. It's meant to mean stupid, amongst other things.
[1] https://youtu.be/60D7SN06A8M
The term implies something that feels like "dodo" or imbecile.
Corvids and parrots and raptors are remarkably smart, yet not every bird species is. Some are incredibly stupid.
There's also the anecdote (maybe just in the American South?) of a chicken running around with its head cut off.
Also think of the "Always Sunny" meme where they call Dee a "bird" all the time [1]. It's meant to mean stupid, amongst other things.
[1] https://youtu.be/60D7SN06A8M