Migratory songbirds in East Asia are in trouble, according to a research (earlier feb) The study calls for national action and international cooperation to deal with threats, as well as more monitoring and research to help understand and protect this unique migration system.
The East Asian-Australasian Flyway, running from Siberia and Alaska down to South-East Asia and Australia, supports the greatest diversity of migratory birds on the planet, with 170 long distance migrant songbirds and over 80 short distance migrants. However, it is also one of most poorly studied of the world’s major migration routes. Remarkably little is known about the populations and ecology of many of its songbird migrants, which rely on habitats along the migratory route for their survival.
Lead by scientists from the Australian National University and Sun Yat-sen University and published in BirdLife’s journal Bird Conservation International Migratory songbirds in the East Asian-Australasian Flyway: a review from a conservation perspective draws together what is known and highlights gaps where more study is urgently required.
The study reveals many migratory songbirds are declining in the East Asian-Australasian Flyway, owing to a range of threats operating across many countries. The paper makes a strong case that both national action and international cooperation are needed for effective conservation.
Migration is tough enough for birds, and especially for small birds weighing only a few grams and needing to refuel often, so any threats that affect them along their migratory route can add up and take their toll on whole populations. Currently available evidence suggests that habitat loss and hunting are the two most significant threats on the East Asia flyway, while other threats like invasive species, climate change and collision with man-made structures can also have a big impact.
Some species, like the Vulnerable Izu Leaf-warbler Phylloscopus ijimae and Pleske’s Grasshopper-warbler Locustella pleskei are particularly at risk not just because of their small breeding ranges, but that their entire wintering ranges remain unknown to scientists, thus hampering effective conservation. The Endangered Yellow-breasted Bunting Emberiza aureola used to be abundant, but have drastically declined as large numbers are.. Read Report on asian songbirds migrants >>>