I'm listening to a 1962 self-titled album by Carolyn Hester, and it has a song called "Los Bibilicos," which has the same tune as "The Swallow Song." Could it be that Farina's song is a translation of an earlier song, or what? What are bibilicos? Note that Farina wrote the "Swallow Song" in 1964.
My first guess was that it's Spanish, but maybe it's Ladino. Something like "los bibilicos cantan en los arbores," so whatever they are, are singin' in the trees or something like that.
Anybody got lyrics, background information, and a translation?
-Joe Offer-