Northern Shrike Lanius excubitor is split into Northern Shrike L. borealis (North America and eastern/central Asia) and Great Gray Shrike L. excubitor (central/western Asia and Europe).
(See comment below with Clements subspecies ranges; note that Clements recognizes only sspp. excubitor, homeyeri, and leucopterus as belonging to Lanius excubitor, and assigns all other subspecies considered L. excubitor by some to L. meridionalis)
Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2017. The eBird/Clements checklist of birds of the world: v2017. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/ (קישור)
Range descriptions from Clements:
Great Gray Shrike, Lanius excubitor *L. e. excubitor: W and n Europe to w Siberia
*L. e. homeyeri: Balkan Peninsula to s Ural Mountains and w Siberia
*L. e. leucopterus: W Siberia to Yenisey River
Northern Shrike, Lanius borealis *L. b. sibiricus: E Siberia to n Mongolia and Kamchatka Peninsula
*L. b. bianchii: Sakhalin and s Kuril Islands (n Japan)
*L. b. mollis: Russian Altai and nw Mongolia
*L. b. funereus: W China (Tien Shan Mountains)
*L. b. borealis: breeds Alaska and northern Canada, south to extreme northern British Columbia and Alberta, northern Ontario, and Quebec; winters southern Canada and northern United States.
And for reference:
Southern Gray Shrike, L. meridionalis *L. m. meridionalis: Iberian Peninsula and s France; > to nw Africa
*L. m. koenigi: Canary Islands
*L. m. algeriensis: Morocco (n of Atlas Mountains), coastal n Algeria and Tunisia
*L. m. elegans: N Sahara (Mauritania to Sinai Peninsula and Red Sea)
*L. m. leucopygos: S Sahara (Mali to Nile River valley of the Sudan)
*L. m. aucheri: W coast of Red Sea to s Iran and Arabian Peninsula
*L. m. theresae: Galilee hills of n Israel and s Lebanon
*L. m. buryi: Yemen; vagrant to Djibouti and Ethiopia
*L. m. uncinatus: Socotra
*L. m. jebelmarrae: W Sudan (Darfur)
*L. m. lahtora: E Pakistan and n India
*L. m. pallidirostris: Iran to arid steppes of w China (Xinjiang, Gansu and Ningsia)
חילוקי דעות לא מכוונים מתרחשים כאשר הורה (B) עובר דילול באמצעות החלפת צאצא (E) אל חלק אחר בעץ הטקסונומי, מה שגורם לזיהויים קיימים של ההורה להתפרש כחילוקי דעות עם זיהויים קיימים של הצאצא שהוחלף.
Identification
זיהוי 2 של טקסוןE יהיה חילוקי דעות לא מכוונים עם זיהוי 1 של טקסון B לאחר החלפת הטקסון
אם דילול של הורה גורם ליותר מ-10 חילוקים דעות לא מכוונים, כדאי לך לפצל את ההורה לאחר החלפת הצאצא כדי להחליף זיהויים קיימים של הורה (B) בזיהויים לא סותרים.
Range descriptions from Clements:
Great Gray Shrike, Lanius excubitor
*L. e. excubitor: W and n Europe to w Siberia
*L. e. homeyeri: Balkan Peninsula to s Ural Mountains and w Siberia
*L. e. leucopterus: W Siberia to Yenisey River
Northern Shrike, Lanius borealis
*L. b. sibiricus: E Siberia to n Mongolia and Kamchatka Peninsula
*L. b. bianchii: Sakhalin and s Kuril Islands (n Japan)
*L. b. mollis: Russian Altai and nw Mongolia
*L. b. funereus: W China (Tien Shan Mountains)
*L. b. borealis: breeds Alaska and northern Canada, south to extreme northern British Columbia and Alberta, northern Ontario, and Quebec; winters southern Canada and northern United States.
And for reference:
Southern Gray Shrike, L. meridionalis
*L. m. meridionalis: Iberian Peninsula and s France; > to nw Africa
*L. m. koenigi: Canary Islands
*L. m. algeriensis: Morocco (n of Atlas Mountains), coastal n Algeria and Tunisia
*L. m. elegans: N Sahara (Mauritania to Sinai Peninsula and Red Sea)
*L. m. leucopygos: S Sahara (Mali to Nile River valley of the Sudan)
*L. m. aucheri: W coast of Red Sea to s Iran and Arabian Peninsula
*L. m. theresae: Galilee hills of n Israel and s Lebanon
*L. m. buryi: Yemen; vagrant to Djibouti and Ethiopia
*L. m. uncinatus: Socotra
*L. m. jebelmarrae: W Sudan (Darfur)
*L. m. lahtora: E Pakistan and n India
*L. m. pallidirostris: Iran to arid steppes of w China (Xinjiang, Gansu and Ningsia)