Skip to content

Far Eastern Oystercatchers Began Migration With Tailwinds in Both Spring and Autumn

Far Eastern oystercatcher standing on a rocky shore in Nikolai Bay, Russia
Research · Ecology

GPS tracking of far eastern oystercatchers (Haematopus ostralegus osculans) found that the birds consistently began migration under favourable tailwinds during both spring and autumn. The study, first published online on 7 January 2026, followed 12 birds tagged at the Yalu Jiang estuary in the northern Yellow Sea.

The sample included five adults and seven immature birds in their second or third year. Most wintered along the western coast of the Yellow Sea and bred inland in northeastern China. The average migration distance was about 1,641 kilometres in spring and 1,669 kilometres in autumn.

Departure days had stronger wind support

Migration generally began around sunset. At wintering, breeding and stopover sites, wind conditions on departure days provided tailwinds, and the available wind support was greater than the average during the previous five or 10 days.

Temperature also affected some decisions. During autumn migration, birds leaving stopover sites departed on days that were colder than the preceding five- or 10-day average. The authors conclude that wind influenced migration decisions throughout the annual cycle, while temperature also played a role when birds left stopover sites in autumn.

Yalu Jiang was the main stopover in both seasons

The Yalu Jiang estuary was the principal stopover used by the tagged birds in both spring and autumn, although two immature birds used the Liaohe estuary instead during autumn migration in 2022. Autumn stays at Yalu Jiang were especially long: adults remained for an average of 118.3 days and immature birds for 130.4 days.

The researchers suggest that this unusually long autumn stopover is probably linked to moulting their flight feathers. They highlight the extended stay as evidence of the importance of Yalu Jiang to the annual cycle of this population.

Young birds migrated later in spring

Immature birds left the wintering grounds and reached the breeding grounds later than adults during spring migration. In autumn, however, there was no clear age difference in departure from breeding areas or arrival at wintering sites.

Sources and image credit

  1. Zhao, X., Bai, Q., Zhang, S., Melville, D. S., Liu, N., Fang, Y., Li, D., & Ma, Z. (2026). Effects of wind and temperature on the migration decisions of a short-distance migratory shorebird across the annual cycle. Avian Research, 17, 100338. https://doi.org/10.1016/j.avrs.2026.100338Primary open-access research article; available online 7 January 2026; CC BY 4.0.

Image: svetlanakhanty — Far Eastern oystercatcher (Haematopus ostralegus osculans) at Nikolai Bay, Khabarovsk Krai, Russia, photographed 17 July 2022; exact study subspecies, representative image, not one of the GPS-tagged birds. Source: Wikimedia Commons. · CC0 · Source

About this content: This story was produced with AI assistance within an editorial workflow developed by Wildlife Vagabond. Editorial responsibility remains with Wildlife Vagabond.How AI is used

Ecology

SPECIES IN THIS STORY

Species in this story

Eurasian Oystercatcher Haematopus ostralegus Explore species

Independent research and conservation news archive

Did you find this information useful?

Wildlife Vagabond is independently built and maintained. Voluntary support helps cover source verification, hosting and continued work on research and conservation news.

Support Wildlife Vagabond

The news archive will remain freely available.