0 a bird that migrates (= moves from one area to another when the season changes)
At present the organization has to rely on young, inexperienced graduates who are usually birds of passage.
Profit is a bird of passage always on the wing as opposed to interest, which is permanent, inexorable and heartless.
That does not mean that someone is a bird of passage.
Is he a bird of passage or is he a permanent resident?
After all, everyone of us is only a bird of passage.
We may in the course of our discussions discover that this creature is really a bird of passage and not a resident.
That gives the go-by to the bird of passage, no matter how many constituencies he has travelled through.
I understand that in theory a class teacher is only supposed to be a bird of passage—that it is a means whereby he shall become some day a head teacher.
Against that, you have the man who is a bird of passage and who may have moved through three or four constituencies in the course of the last two months.
