Here you are at F Pool, and for many years it has been home to ABJ and his mate. You may see ABJ out there, he is the oldest known loon in the world and he was hatched on the Refuge on G Pool, in 1987. You also might wonder, what does ABJ mean, how did he get that name? ABJ is an acronym for Adult Banded as Juvenile. In 1987 common loons were added to the Threatened Species list in Michigan so ABJ and many other loons were banded. From 1987-2012, a total of 239 adults and chicks were banded here at Seney.