A Seltenvogel (ZELT-en-foh-gel) is a bird-like Wesen, which Monroe compared to a canary or parakeet. They are hardly seen anymore--to the point where Monroe believed that they were extinct until Nick reported seeing one--and were previously kept as "pets" by royal families. Once in its lifetime, a Seltenvogel will develop a glandular bump on the center of their neck below their chin. Inside this bump is a golden item, called "Unbezahlbar" (meaning "priceless"), that must be cut out before it grows too large or the Seltenvogel will die. It is extremely rare, estimated to be worth hundreds of thousands of dollars; however, if broken, it is worthless. Seltenvogel is a combination of the words: "selten" meaning "rare", and "vogel" meaning "bird".