|Scientific Name:||Phylloscopus borealis|
|Species Authority:||(Blasius, 1858)|
|Taxonomic Source(s):||Christidis, L. and Boles, W.E. 2008. Systematics and taxonomy of Australian birds. CSIRO Publishing, Collingwood, Australia.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Reviewer(s):||Butchart, S. & Symes, A.|
|Facilitator/Compiler(s):||Ekstrom, J., Butchart, S.|
This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be stable, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
|Previously published Red List assessments:|
Native:Brunei Darussalam; Cambodia; Canada; China; Finland; Hong Kong; India; Indonesia; Japan; Korea, Democratic People's Republic of; Korea, Republic of; Lao People's Democratic Republic; Malaysia; Mexico; Mongolia; Myanmar; Norway; Philippines; Russian Federation; Singapore; Sweden; Taiwan, Province of China; Tajikistan; Thailand; Timor-Leste; United States; Viet Nam
Vagrant:Australia; Bulgaria; Denmark; Faroe Islands; France; Germany; Gibraltar; Greece; Ireland; Italy; Kazakhstan; Luxembourg; Malta; Netherlands; Oman; Poland; Saudi Arabia; Spain; United Kingdom
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Rich et al. (2004) estimated the global population to number 30,000,000 individuals. In Europe, the breeding population is estimated to number 4,500,000-8,000,000 breeding pairs, equating to 13,500,000-24,000,000 individuals (BirdLife International 2004). Europe forms 5-24% of the global range, so a very preliminary estimate of the global population size is 56,300,000-480,000,000 individuals, although further validation of this estimate is needed. National population estimates include: c.10,000-100,000 breeding pairs, c.1,000-10,000 individuals on migration and c.50-10,000 wintering individuals in China; c.1,000-10,000 individuals on migration and c.1,000-10,000 wintering individuals in Taiwan; c.10,000-100,000 breeding pairs, c.1,000-10,000 individuals on migration and < c.50 wintering individuals in Japan and c.10,000-100,000 breeding pairs and c.1,000-10,000 individuals on migration in Russia (Brazil 2009).|
Trend Justification: The population is suspected to be stable in the absence of evidence for any declines or substantial threats.
|Current Population Trend:||Stable|
|Citation:||BirdLife International. 2012. Phylloscopus borealis. The IUCN Red List of Threatened Species 2012: e.T22715316A39537822.Downloaded on 25 July 2016.|
|Feedback:||If you see any errors or have any questions or suggestions on what is shown on this page, please provide us with feedback so that we can correct or extend the information provided|