According to one of the staff at Fushan Research Station, in past years flocks of ducks and geese would come to spend the winter here, laying their eggs in bird's nest ferns (Asplenium nidus), epiphytic plants which grow on the branches of the trees.
據一位福山分所的職員表示，往年曾有成群的雁鴨飛來這裡過冬，將蛋產在附生樹上的鳥巢蕨裡，今年園裡人多，這種景況不復見。