birds fly at beidaihe wetland

bird sea flock shore seabird mudflat animal sky water wave ocean gull morning waterbird horizon coast beach wind birds fly beidaihe wetland 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