(Portland, OR) -- The Oregon Zoo announced that polar bear Amelia Gray will move to Brookfield Zoo Chicago in early September as part of a breeding program. Zoo officials say the move is aimed at helping sustain a genetically diverse polar bear population while supporting conservation efforts in the wild. Amelia has lived in Portland since 2021 after being born at the Columbus Zoo in 2016. Her half-sister Nora will remain in Portland, with future opportunities to raise cubs possible.