The bill is yellow or orange, but turns green in older birds.
"Why would they offer money to an old bird like me?"
Fully developed trains are found in birds older than four years.
What if the old bird in the antique store was wrong?
Like all her kind, she was a tough old bird.
They must be a very old bird from the earliest times.
That old bird watched over us a lot of times.
She's always seemed like a tough old bird to me.
"Well, anyway, just tell me what you think of the old bird."
Us tough old birds got to stick together, you know.
Idiomy