Give Scaly-sided Merganser a Home!

With a thin red bill and a scaled dark pattern on the flanks and rump, Scaly-sided Merganser is one of only four existing species of sawbills (nickname for large mergansers of the genus Mergus). Its existence is under threat because of habitat loss.


The Scaly-sided Merganser is listed as Endangered in the IUCN Red List of Threatened Species. At present, the population has declined to around 2,400-4,500 mature individuals. Their main habitats are located in temperate East Asia, especially along the rivers in Primorye (Russia) which are the core breeding areas. The declining population trend is mainly due to the loss of habitats (neritic, forest, wetlands), human disturbance, as well as pollution from industrial and agricultural effluents.

Artificial Nests

In order to increase the productivity of Scaly-sided Mergansers, artificial nests were provided along fifteen rivers of Primorye between 2000 and 2019, apparent nesting success rate was around 70% in 2003-2017 in average, and a total of 1641 ducklings reliably hatched in artificial nests during 2002–2019.

However, the duration of a nest could not exceed more than 8 years in general, so constant replacement of the nests is of vital importance to conserve Scaly-sided Mergansers. Read More

Your support makes a difference!

Your support is vital to contribute to the productivity of Scaly-sided Mergansers. For those who make a donation, a nameplate would be made and attached to the nest in appreciation of donation $ 100 for building and erecting of a new nest. For additional $50 the nest might be equipped with video-camera. Smaller donations would help to maintain existing artificial nests.

The difference we make in Scaly-sided Mergansers’ lives is crucial. Please do not hesitate and support the conservation work for Scaly-sided Mergansers!

Support Scaly-sided Merganser

Personal Info

Donation Total: $10.00

For Domestic Supporters (후원하기)

EAAFP Secretariat greatly appreciates your generous donation in support of Scaly-sided Merganser.

“Hanns-Seidel-Foundation Korea since 2005 has a program on sustainable development in the inner-Korean border area and since 2015 supports biodiversity projects in Democratic People’s Republic of Korea (DPRK). Scaly-sided Mergansers are one of the most threatened species in this part of the world, and they are migratory through the whole Korean Peninsula, to winter in the central Peninsula, in places like Imjingang, a border river of North and South, Hangang river just South of Seoul and in Chungchon provinces. For us, the idea to support breeding SSM in Russia was therefore quite natural. It is a way to show our appreciation for the great work you do – and only, when the whole flyway, from breeding to wintering areas, is safe, species will survive. We collected the money from our office to make this possible. Let us hope that the SSM will also in the future roam through Northeast Asia and find enough places to winter and breed safely. Thank you very much for your great work in the breeding areas.”