birds fly at beidaihe wetland

bird flock animal seabird gull waterbird branch winter sky shorebird sea wildlife mudflat line wing wetland flight flower birds fly beidaihe qinhuangdao city hebei province china birds group waves fly wildlife water ocean wetland migration migratory resident waders background landscape natural spectacular ecology environmental protection beidaihe qinhuangdao hebei watching spring fall animals flying sky seagull nature beach blue flight flock gull wild sand white