Canada (NB), China (mainland), Estonia (B) (NB), Finland (B) (NB), Kazakhstan, Kyrgyzstan (B) (NB), Latvia (E) (B), Mongolia (B), North Korea, Norway (B), Russia (Asian) (B), Russia (Central Asian) (B) (NB), Russia (European) (B) (NB), Sweden (B) (NB), USA (B).
Northern Hawk-Owl (Surnia ulula) [XC731034]
by Marc Anderson from Gransj\u00f6n, Vilhelmina Municipality, V\u00e4sterbotten County, Sweden (alarm call)
Northern Hawk-Owl (Surnia ulula) [XC840362]
by Patrik \u00c5berg from Trapper Creek, Matanuska-Susitna, Alaska, United States (call, duet)
Subspecies
Siberian populations, formerly separated as pallasi, included in nominate.
The following 3 subspecies are recognised:
ulula (Linnaeus, 1758) - Northern Eurasia east to Kamchatka and Sakhalin, central Siberia south to Tarbagatay.
tianschanica Smallbones, 1906 - Central Asia and north-western and north-eastern China, possibly also northern Mongolia.
caparoch (Müller, PLS, 1776) - Alaska through Canada to Newfoundland, south to extreme northern USA.