In any case, I think it's evidence that calling someone a 'Bird Brain', isn't such an insult after all.
Those 'peckers' (pun2) are smarter than most college grads, at least those with a BA in Psychology 
Sorry but I loathe all 'Arts' degrees. My career is/was in SCIENCE.
So if it isn't at least a 'BSxx' it don't count for squat.
Flycatcher identified it in post #8—I think it’s kind of a cousin to our crow.