Top 10 Shorebird Sites on the East Asian-Australasian Flyway
The East Asian-Australasian Flyway (EAAF) connects Arctic and sub-Arctic breeding grounds in Russia, Alaska, and Canada with wintering areas in Southeast Asia, Australia, and New Zealand. Approximately 50 million waterbirds use the flyway annually, including some of the world's most remarkable migratory athletes — Bar-tailed Godwits (Limosa lapponica baueri) that fly non-stop from Alaska to New Zealand, covering 12,000 kilometres in 8 to 10 days without feeding or sleeping. The Yellow Sea coast between China and South Korea is the critical fuelling bottleneck; the loss of 65 percent of Yellow Sea intertidal habitat since the 1950s has driven catastrophic declines in several flyway species.
1. Saemangeum, South Korea (Wadden-Sea equivalent before reclamation)
The Saemangeum reclamation converted 400 square kilometres of the most productive intertidal feeding habitat on the flyway between 2006 and 2010. What remains of the wider tidal complex — the Gomso Bay areas north of the reclamation and the Dongjin and Mangyung estuaries — still holds important staging concentrations of Great Knot (Calidris tenuirostris, Endangered), Bar-tailed Godwit, and Dunlin in April-May. The loss of Saemangeum is the most thoroughly documented conservation disaster in EAAF shorebird research.
2. Yalu Jiang National Nature Reserve, China
The Yalu Jiang (Yalu River) estuary on the China-Korea border holds the most important staging area on the flyway for northbound Bar-tailed Godwit and Red Knot (Calidris canutus) in April-May. Up to 300,000 Bar-tailed Godwits have been counted here simultaneously — the entire population of the subspecies baueri staging before their trans-Pacific flight to Alaska. The mudflats are accessible from Dandong.
3. Incheon (Songdo/Ganghwa), South Korea
The Incheon area near Seoul holds the most important Yellow Sea staging complex remaining in South Korea following the Saemangeum loss. The Ganghwa mudflats and the Songdo reclamation edges still hold Great Knot, Bar-tailed Godwit, and Spoon-billed Sandpiper (Calidris pygmaea, Critically Endangered) in spring. The EAAFP secretariat operates from Incheon city; the political significance of the site as the "home" of the flyway partnership adds policy context.
4. Yellow Sea coast, Jiangsu, China
The Yancheng section of the Jiangsu Yellow Sea coast, including the Tiaozini reclamation edge and the remaining unreclaimed flats, holds the largest concentrations of Great Knot and Bar-tailed Godwit remaining on the Chinese coast. The Yancheng UNESCO World Heritage Site designation (2019) covers the core intertidal zone. The observation points and hides documented in the map database (observation platforms along the Yancheng coast) provide access.
5. Roebuck Bay, Broome, Western Australia
Roebuck Bay is the most important shorebird wintering site in Australia. Up to 200,000 waders — Bar-tailed Godwit, Great Knot, Red Knot, Ruddy Turnstone (Arenaria interpres), and the full northern-flyway complement — winter or stage at the bay. The Broome Bird Observatory, operated since 1988, provides accommodation and expert guide services at the premier inland-to-coastal shorebird site in the Southern Hemisphere.
6. Gulf of Carpentaria, Northern Territory, Australia
The vast tidal flats of the Gulf of Carpentaria hold one of the largest wintering populations of Far Eastern Curlew (Numenius madagascariensis, Endangered) and Whimbrel (Numenius phaeopus) in Australia. The remote coastline is largely undisturbed; access from Darwin or Cairns requires commitment.
7. Miranda, Firth of Thames, New Zealand
Miranda on the Firth of Thames south of Auckland is New Zealand's most important shorebird staging site. Bar-tailed Godwit, Red Knot, and Hudsonian Godwit (from the Americas-flyway) winter here; the Miranda Shorebird Centre provides hides and guide services. The godwit departure in late March, when birds gain extreme weight and then vanish on their trans-Pacific non-stop flight, can be witnessed from the Miranda foreshore.
8. Mai Po Marshes, Hong Kong
The Mai Po managed fishponds and Deep Bay mudflats are one of the most intensively studied EAAF sites. Black-faced Spoonbill (Platalea minor, Endangered) winters at Mai Po in one of the largest concentrations of this species anywhere; Spoon-billed Sandpiper wintered regularly in the 1990s-2000s. The WWF managed reserve provides hides and an educational program.
9. Chukotka and the Yukon-Kuskokwim Delta, Alaska (breeding)
The breeding grounds of the flyway's most threatened species — Bar-tailed Godwit (baueri subspecies breeds in western Alaska), Spoon-billed Sandpiper (breeds in Chukotka), and Red Knot (piersmai subspecies breeds in central Siberia) — are remote Arctic tundra. Ground-nesting shorebirds at these sites are vulnerable to increasing predator activity as Arctic warming expands fox and gull ranges into formerly treeless tundra.
10. Nakdong River estuary, South Korea
The Nakdong estuary near Busan is the most important shorebird site in southern Korea and one of the few Yellow Sea sites with a significant Ramsar wetland designation. Far Eastern Curlew (Numenius madagascariensis, Endangered) and Nordmann's Greenshank (Tringa guttifer, Endangered) winter regularly; the freshwater side of the estuary holds wintering duck flocks. The Eulsukdo Bird Sanctuary within the estuary provides the primary observation infrastructure.
Planning an East Asian-Australasian Flyway shorebird trip
The East Asian-Australasian Flyway (EAAF) presents specific logistical challenges because the most important shorebird staging areas — Yalu Jiang and Dandong on the Yellow Sea, the Korean saemangeum reclamation — involve visiting China and North Korea's adjacent shores, which requires advance planning of Chinese visas and awareness of access restrictions.
The most accessible high-quality EAAF shorebird sites for international visitors are in South Korea, Japan, and Australia. South Korea's Saemangeum tidal flat — despite the catastrophic partial reclamation since 2006 — still holds the largest regular Bar-tailed Godwit staging concentrations in the flyway, accessible from Gunsan or Jeonju by bus. The Geum Estuary (Seocheon) and the Nakdong Estuary near Busan both provide major staging areas for northbound waders in April and May.
Japan's Kyushu island provides the most organized shorebird watching infrastructure in East Asia. The Arasaki crane-watching center near Izumi holds 90% of the world's Hooded Crane (Grus monacha, Vulnerable) wintering population — up to 10,000 birds — visible from organized hides from November to March. The Fujimae Tidal Flat near Nagoya (a Ramsar wetland) provides urban-accessible shorebird watching.
Australia's northwest coast — Roebuck Bay at Broome and the Eighty Mile Beach — holds the largest Red Knot and Bar-tailed Godwit staging concentrations in the southern hemisphere, where birds arrive from Siberian breeding grounds in August-September. Broome Bird Observatory provides accommodation and guided trips to the tidal flat roosting sites.
The key timing is matching the visit to the migration calendar: northbound passage through the Yellow Sea in April to May, southbound arrival in Australia August to October. The EAAF Partnership organization maintains a regularly updated species status overview that provides seasonal timing recommendations for each species group.
Broome Bird Observatory: the southern hemisphere hub
Broome Bird Observatory on Roebuck Bay in Western Australia provides the most organized access to the EAAF's southern hemisphere staging areas. The observatory accommodation is located immediately on the bay shore, and early morning low-tide walks on the beach mudflat encounter roosting shorebirds at close range. The August-September arrival of southbound migrants — Great Knot (Calidris tenuirostris, Endangered) and Red Knot from Siberian breeding grounds — produces some of the highest-density shorebird concentrations visible from shore anywhere in Australia. The observatory's resident ornithologist provides identification assistance and current species lists for visiting birders.