Chú thích Cú diều phương Bắc

  1. ↑ BirdLife International (2012). “Surnia ulula”. Sách Đỏ IUCN các loài bị đe dọa. Phiên bản 2013.2. Liên minh Bảo tồn Thiên nhiên Quốc tế. Truy cập ngày 26 tháng 11 năm 2013.
  2. ↑ 10th edition of Systema Naturae.
  3. ↑ Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. tr. 374, 395. ISBN 978-1-4081-2501-4.
  4. 1 2 3 4 5 Duncan, James R. and Patricia A. Duncan. (1998) Northern Hawk-Owl (Surnia ulula), The Birds of North America Online (A. Poole, Ed.). Ithaca: Cornell Lab of Ornithology; Retrieved from the Birds of North America Online: doi:10.2173/bna.356.
  5. ↑ Sonerud, Geir A. (1992). “Search tactics of a pause-travel predator: adaptive adjustments of perching times and move distances by hawk owls (Surnia ulula)”. Behav Ecol Sociobiol. 30 (3–4): 207–217. doi:10.1007/BF00166705.
  6. ↑ Voous KH, Cameron A. (1989) Owls of the northern hemisphere. Cambridge (MA): MIT Press ISBN 0262220350.
  7. 1 2 König C, Weick F, Wink M. 2008. Owls of the world. London: Christopher Helm.
Surnia ulula ulula

Tài liệu tham khảo

WikiPedia: Cú diều phương Bắc http://www.sararegistry.gc.ca/species/speciesDetai... http://www.enature.com/fieldguides/detail.asp?recn... http://www.owlpages.com/owls.php?genus=Surnia&spec... http://bna.birds.cornell.edu/bna/species/356 http://www.birds.cornell.edu/AllAboutBirds/BirdGui... http://www.eu-nomen.eu/portal/taxon.php?GUID=urn:l... http://vireo.acnatsci.org/search.html?Form=Search&... http://www.bird-stamps.org/cspecies/7811800.htm http://datazone.birdlife.org/species/factsheet/226... http://www.boldsystems.org/index.php/TaxBrowser_Ta...