rara avis แปลว่า

"Ramsay flung open the door. "Lord Fred—damn it we are all in the lurch!", he exclaimed, […] "my rara avises have taken wing and flown off." / "What were they actually, Ramsay?" asked Newbank. / "Two black swans," replied he—"the finest creatures ever were beheld, except another of the kind that is in company with them, though I understand there is more of the breed.""

"Over the next eight months, with practically no funding except for what I could borrow, with an afflicted conscience, from my mother, I scoured the remotest corners of Cuba for rarae aves. I hitchhiked, jumped freight trains, cajoled guajiros into lending me their mules, slept in caves or beneath the canopies of immense ceiba trees. Cuba's landscape had changed so dramatically in only a decade that even the once populous birds that Dr. Forrest and I had collected were nowhere to be found, or found, at most, as singletons or in minuscule bands."

"That Parsons girl is quite the rara avis if you ask me."