Jackie, the beloved bald eagle from California’s Big Bear, died Monday morning at age 14 following a mysterious illness. Jackie had been battling the illness for weeks at a rehabilitation center in Ojai before her untimely death. But in mid-July, Jackie was found weak, disheveled and unable to fly on the north shore of the lake after a scuffle with two younger eagles. The Ojai rehabilitation center mourned Jackie’s death in an Instagram post on Monday. Experts were unable to determine the exact cause of Jackie’s mysterious illness following a series of tests and a CT scan.