-- CNN 's Chie Kobayashi contributed to this report . It gave polar bear cub to its resident bear and waited for it to fly . And it waited and waited : it never made amorous advances toward Kurumi . Months later , the zoo makes key discovery : both bears are female .
It gave polar bear cub to its resident bear and waited for it to fly . And it waited and waited : it never made amorous advances toward Kurumi . Months later , the zoo makes key discovery : both bears are female .