|Red List Category & Criteria:
||Butchart, S., Ekstrom, J. & Symes, A.
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 increasing, 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:|
- 2012 – Least Concern (LC) –
- 2009 – Least Concern (LC) –
- 2008 – Least Concern (LC) –
- 2004 – Least Concern (LC) –
- 2000 – Lower Risk/least concern (LR/lc) –
- 1994 – Lower Risk/least concern (LR/lc) –
- 1988 – Lower Risk/least concern (LR/lc) –
|Population:||The global population is estimated to number > c.3,000,000 individuals (Rich et al. 2004), while national population sizes have been estimated at c.50-10,000 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: This species has undergone a small or statistically insignificant decrease over the last 40 years in North America (data from Breeding Bird Survey and/or Christmas Bird Count: Butcher and Niven 2007). In Europe the overall trend from 1980-2011 was increasing, based on provisional data for 27 countries from the Pan-European Common Bird Monitoring Scheme (EBCC/RSPB/BirdLife/Statistics Netherlands).
|Current Population Trend:||Increasing|
|♦ Continuing decline of mature individuals:||Unknown|
|♦ Extreme fluctuations:||No||♦ Population severely fragmented:||No|
|♦ Continuing decline in subpopulations:||Unknown|
|♦ Extreme fluctuations in subpopulations:||No||♦ All individuals in one subpopulation:||No|