三个数字不能混成一张当天清单
官方资料中的300余种是保护区长期累计名录；近十年56种、近6万只来自环志和追踪资料；去年40万只次是监测工作中的水鸟记录量。物种数、个体数和鸟次统计口径不同，都不能改写成游客某天可看到的数量。
秋迁窗口说明此时具有季节价值，但不保证目标鸟。潮汐会改变可见滩面，风、雾和降雨会改变鸟群高度与停留时间；把日期、时段、潮位和观察范围写进记录，比追求一个大总数更有用。
行程要先过开放、潮汐、交通三关
世界遗产身份不等于整个东滩对游客开放。出发前查看保护区或访客设施当天公告，确认预约、开放时段和可进入边界；再核对正规潮汐与天气信息，但不据此推算并传播珍稀鸟实时位置。
崇明岛范围大，公共交通与返程时间应预留余量。只选择一个合法访客区或公共观鸟点，不把保护区科研信息、环志照片和网络旧记录当成导航坐标；现场封闭、施工或巡护指令始终优先。
科研方法不能由游客复制
官方报道中的环志、传统鸟哨和潮间带采样由专业团队依照许可、方案和安全窗口执行。游客不得模仿捕捉、诱引、播放或下滩操作，也不要靠近网具、环志人员和放飞流程。
使用双筒镜或单筒望远镜从固定设施观察，不放无人机、不投喂、不围堵、不追车。公开照片删除定位，珍稀物种只写崇明或保护地级范围；原始证据通过管理机构认可渠道提交。
Three figures cannot become one day's checklist
More than 300 species is the reserve's cumulative list. Nearly 60,000 birds of 56 species comes from a decade of ringing and tracking. Last year's 400,000 waterbird encounters are a monitoring total. Species, individuals and encounters use different units, and none is a visitor's daily promise.
The autumn window shows seasonal importance but does not guarantee a target. Tide changes exposed flats, while wind, fog and rain alter flight and stopover. Recording date, time, tide and coverage is more useful than chasing a large total.
Verify access, tide and transport
World Heritage status does not open the whole Dongtan to visitors. Before departure, read same-day reserve or visitor-facility notices for reservations, hours and boundaries, then check a reliable tide and weather source without using it to infer or broadcast a live rarity location.
Chongming Island is large, so allow transport and return margin. Choose one legal visitor area or public viewpoint. Never use research reports, ringing photographs or an old online record as a navigation pin; closures, works and ranger instructions always take priority.
Visitors must not copy research methods
Ringing, traditional calls and intertidal sampling in official reports are performed by licensed teams under protocols and safe windows. Visitors must not imitate capture, attraction, playback or flat entry, or approach nets, ringers and release work.
Use binoculars or a scope from fixed facilities. No drones, feeding, crowding or vehicle pursuit. Strip coordinates from public images, keep rare birds at Chongming or reserve scale, and submit original evidence through a channel recognized by management.