Voice
An abrupt 'bick', 'kwick' or 'kip' uttered in contact. A short, shrill, rattled 'kri-kri-kri-kri' uttered in alarm. A short, powerful drumming, accelerating and trailing off at the end.
Eurasian Three-toed Woodpecker (Picoides tridactylus) [XC379862]
by Karl-Birger Strann from Sodankyl\u00e4, Northern Lapland, Lapland, Finland (alarm call)
Eurasian Three-toed Woodpecker (Picoides) [XC172699]
by Jerome Fischer from Tudulinna Parish, Ida-Viru County, Estonia (drumming)
Subspecies
Picoides tridactylus (Sibley and Monroe 1990, 1993) has been split into Three-toed Woodpecker (Picoides tridactylus) and American Three-toed Woodpecker (Picoides dorsalis) following AOU (2003).
Forms a superspecies with American Three-toed Woodpecker (Picoides dorsalis) and commonly treated as conspecific; genetic evidence, however, coupled with geographical isolation and differences in plumage, indicate that the two are probably better considered separate species. Closely related also to Black-backed Woodpecker (Picoides arcticus), but links with other American congeners apparently not strong.
Currently accepted subspecies designated according to coloration, but variation is clinal, birds becoming darker and larger from north to south. Birds from Sakhalin, described as subspecies sakhalinensis, appear indistinguishable from nominate. Named subspecies tianschanicus (Tien Shan), kurodai (Korea) and inouyei (east-central Hokkaido) barely differ from European alpinus, thus regarded as better merged with that taxon.
The following 8 subspecies are recognised:
tridactylus (Linnaeus, 1758) - Northern Europe eastern across southern taiga to Altai Mts, northern Mongolia, Manchuria, Ussuriland and Sakhalin.
crissoleucus (Reichenbach, 1854) - Northern taiga from Urals east to Sea of Okhotsk.
albidior Stejneger, 1885 - Kamchatka.
alpinus Brehm, CL, 1831 - Mountains of central, southern and south-eastern Europe, Tien Shan, north-eastern Korea and northern Japan (Hokkaido).
funebris Verreaux, J, 1871 - South-western China to Tibet. Considered by some authors to be a distinct species, Dark-bodied Woodpecker (Picoides funebris).
tianschanicus Buturlin, 1907 - Eastern Kazakhstan and western China.
kurodai Yamashina, 1930 - North-eastern China and northern Korea.