This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence 30% decline over ten years or three generations).
The population size is very large, and hence does not approach the thresholds for Vulnerable under the population size criterion (10% in ten years or three generations, or with a specified population structure).
For these reasons the species is evaluated as Least Concern.
This species breeds in most of the northern North America, south to the Great Lakes, in Greenland (to Denmark), Iceland, and much of northern Eurasia south to the United Kingdom, parts of Eastern Europe, north-east China and northern Japan. Its wintering grounds expand its range to include the Atlantic and Pacific coasts of North America, areas of central Europe and the Mediterranean basement, the Black Sea, the southern Caspian Sea, the southern coast of Iran and Pakistan, the eastern coast of China, and the coasts of Korea and Japan (del Hoyo et al. 1992).
Albania; Armenia; Austria; Azerbaijan; Bahamas; Belarus; Belgium; Bermuda; Bosnia and Herzegovina; Bulgaria; Canada; China; Croatia; Cuba; Cyprus; Czech Republic; Denmark; Egypt; Estonia; Faroe Islands; Finland; France; Germany; Greece; Greenland; Hungary; Iceland; Iran, Islamic Republic of; Iraq; Ireland; Israel; Italy; Japan; Kazakhstan; Korea, Democratic People’s Republic of; Korea, Republic of; Kyrgyzstan; Latvia; Libya; Liechtenstein; Lithuania; Macedonia, the former Yugoslav Republic of; Malta; Mexico; Moldova; Montenegro; Morocco; Netherlands; Norway; Pakistan; Poland; Portugal; Romania; Russian Federation (Central Asian Russia, Eastern Asian Russia, European Russia); Saint Pierre and Miquelon; Serbia; Slovakia; Slovenia; Spain (Canary Is. – Vagrant); Sweden; Switzerland; Taiwan, Province of China; Tunisia; Turkey; Turkmenistan; Turks and Caicos Islands; Ukraine; United Kingdom; United States; Uzbekistan