#funadaike point. Stereo microphones and camera installed at the lakeside of Funadai Pond in the Ecological Garden of Chiba Prefectural Chiba Central Museum, Chiba, Japan. the operation started in 2013 but stopped in 2017. Funada Pond is home to a bird observatory and is a popular observation point for bird lovers. The pond is home to bullfrogs (American bullfrog, Lithobates catesbeianus ), whose calls can be heard from spring onwards.