อีกาโคนปากขาว (Thai Wikipedia)

Carlson, Lauren; Townsend, Kelsey. "Corvus frugilegus: Rook". ADW. สืบค้นเมื่อ 18 May 2019.
Carlson, Lauren; Townsend, Kelsey. "Corvus frugilegus: Rook". ADW. สืบค้นเมื่อ 18 May 2019.
Carlson, Lauren; Townsend, Kelsey. "Corvus frugilegus (rook)". Animal Diversity Web (ภาษาอังกฤษ).

archive.org (Global: 6^th place; Thai: 20^th place)

Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 119, 165. ISBN 978-1-4081-2501-4.

bbc.co.uk (Global: 8^th place; Thai: 15^th place)

news.bbc.co.uk

Morelle, Rebecca (May 26, 2009). "Rooks reveal remarkable tool-use". BBC News. สืบค้นเมื่อ May 22, 2010.

books.google.com (Global: 3^rd place; Thai: 5^th place)

Lovegrove, Roger (2007). Silent Fields: The Long Decline of a Nation's Wildlife. Oxford, United Kingdom: Oxford University Press. pp. 79–81, 162–63. ISBN 978-0-19-852071-9.
Froude, James Anthony; Tulloch, John (1857). "Rooks". Fraser's Magazine. Vol. 55 no. 327. pp. 297–311.

britishbirds.co.uk (Global: low place; Thai: low place)

Goodwin, Derek (1955). "Some observations on the reproductive behaviour of rooks" (PDF). British Birds. 48 (3). คลังข้อมูลเก่าเก็บจากแหล่งเดิม (PDF)เมื่อ 2021-05-18. สืบค้นเมื่อ 2021-01-05.

bsc-eoc.org (Global: 4,338^th place; Thai: 6,374^th place)

avibase.bsc-eoc.org

"Corvus frugilegus (Rook) - Avibase". avibase.bsc-eoc.org.

ccsf.edu (Global: low place; Thai: low place)

fog.ccsf.edu

"Rook (Corvus frugilegus)". fog.ccsf.edu.

dktnfe.com (Global: low place; Thai: low place)

ภาพถ่ายนกทุกชนิดที่พบในประเทศไทย อีกาโคนปากขาว Rook 15 พฤศจิกายน 2561.
ภาพถ่ายนกทุกชนิดที่พบในประเทศไทย อีกาปากหนา Large-billed Crow สืบค้นเมื่อ 18 มกราคม 2564.

doi.org (Global: 2^nd place; Thai: 4^th place)

Clayton, Nicola S.; Emery, Nathan J. (August 21, 2007). "The social life of corvids". Current Biology. 17 (16): R652–R656. doi:10.1016/j.cub.2007.05.070. PMID 17714658.
Tebbich, Sabine; Seed, Amanda M.; Emery, Nathan J.; Clayton, Nicola S. (2007). "Non-tool-using rooks, Corvus frugilegus, solve the trap-tube problem". Animal Cognition. 10 (2): 225–231. doi:10.1007/s10071-006-0061-4. PMID 17171360.
Seed, Amanda M.; Tebbich, Sabine; Emery, Nathan J.; Clayton, Nicola S. (2006). "Investigating Physical Cognition in Rooks, Corvus frugilegus". Current Biology. 16 (7): 697–701. doi:10.1016/j.cub.2006.02.066. PMID 16581516.
Bird, Christopher D.; Emery, Nathan J. (2009). "Insightful problem solving and creative tool modification by captive nontool-using rooks". Proceedings of the National Academy of Sciences. 106 (25): 10370–10375. doi:10.1073/pnas.0901008106. ISSN 0027-8424. PMC 2700937. PMID 19478068.
Bird, Christopher D.; Emery, Nathan J. (2009). "Rooks Use Stones to Raise the Water Level to Reach a Floating Worm". Current Biology. 19 (16): 1410–1414. doi:10.1016/j.cub.2009.07.033. PMID 19664926.
Bugnyar, T. (2008). "Animal Cognition: Rooks Team up to Solve a Problem". Current Biology. 18 (12): R530–R532. doi:10.1016/j.cub.2008.04.057. PMID 18579099.
Bird, Christopher D.; Emery, Nathan J. (2010). "Rooks perceive support relations similar to six-month-old babies". Proceedings of the Royal Society of London B: Biological Sciences. 277 (1678): 147–151. doi:10.1098/rspb.2009.1456. ISSN 0962-8452. PMC 2842627. PMID 19812083.

euring.org (Global: low place; Thai: low place)

Euring-Datenblatt (englisch)

hbw.com (Global: 3,128^th place; Thai: low place)

Madge, S. (2019). "Rook (Corvus frugilegus)". Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. สืบค้นเมื่อ 27 May 2019.

inaturalist.ca (Global: low place; Thai: low place)

"Subspecies Corvus frugilegus pastinator". iNaturalist.ca.

inaturalist.org (Global: 8,836^th place; Thai: low place)

portugal.inaturalist.org

"Subspecies Corvus frugilegus frugilegus". iNaturalist.

livescience.com (Global: 1,190^th place; Thai: 1,616^th place)

Weisberger, Mindy (13 August 2018). "Brainy crows trained to pick up trash at theme park". Live Science. สืบค้นเมื่อ 18 May 2019.

nih.gov (Global: 4^th place; Thai: 7^th place)

pubmed.ncbi.nlm.nih.gov

Clayton, Nicola S.; Emery, Nathan J. (August 21, 2007). "The social life of corvids". Current Biology. 17 (16): R652–R656. doi:10.1016/j.cub.2007.05.070. PMID 17714658.
Tebbich, Sabine; Seed, Amanda M.; Emery, Nathan J.; Clayton, Nicola S. (2007). "Non-tool-using rooks, Corvus frugilegus, solve the trap-tube problem". Animal Cognition. 10 (2): 225–231. doi:10.1007/s10071-006-0061-4. PMID 17171360.
Seed, Amanda M.; Tebbich, Sabine; Emery, Nathan J.; Clayton, Nicola S. (2006). "Investigating Physical Cognition in Rooks, Corvus frugilegus". Current Biology. 16 (7): 697–701. doi:10.1016/j.cub.2006.02.066. PMID 16581516.
Bird, Christopher D.; Emery, Nathan J. (2009). "Insightful problem solving and creative tool modification by captive nontool-using rooks". Proceedings of the National Academy of Sciences. 106 (25): 10370–10375. doi:10.1073/pnas.0901008106. ISSN 0027-8424. PMC 2700937. PMID 19478068.
Bird, Christopher D.; Emery, Nathan J. (2009). "Rooks Use Stones to Raise the Water Level to Reach a Floating Worm". Current Biology. 19 (16): 1410–1414. doi:10.1016/j.cub.2009.07.033. PMID 19664926.
Bugnyar, T. (2008). "Animal Cognition: Rooks Team up to Solve a Problem". Current Biology. 18 (12): R530–R532. doi:10.1016/j.cub.2008.04.057. PMID 18579099.
Bird, Christopher D.; Emery, Nathan J. (2010). "Rooks perceive support relations similar to six-month-old babies". Proceedings of the Royal Society of London B: Biological Sciences. 277 (1678): 147–151. doi:10.1098/rspb.2009.1456. ISSN 0962-8452. PMC 2842627. PMID 19812083.

ncbi.nlm.nih.gov

Bird, Christopher D.; Emery, Nathan J. (2009). "Insightful problem solving and creative tool modification by captive nontool-using rooks". Proceedings of the National Academy of Sciences. 106 (25): 10370–10375. doi:10.1073/pnas.0901008106. ISSN 0027-8424. PMC 2700937. PMID 19478068.
Bird, Christopher D.; Emery, Nathan J. (2010). "Rooks perceive support relations similar to six-month-old babies". Proceedings of the Royal Society of London B: Biological Sciences. 277 (1678): 147–151. doi:10.1098/rspb.2009.1456. ISSN 0962-8452. PMC 2842627. PMID 19812083.

nzbirdsonline.org.nz (Global: low place; Thai: low place)

Porter, R.E.R. (2013). "Rook". New Zealand Birds Online. สืบค้นเมื่อ 18 May 2019.

oed.com (Global: 360^th place; Thai: 312^th place)

"Rook". Oxford English Dictionary (Online ed.). Oxford University Press. (จำเป็นต้องสมัครสมาชิกหรือเป็นสมาชิกสถาบันที่เข้าร่วม.)

oxforddictionaries.com (Global: 710^th place; Thai: 187^th place)

en.oxforddictionaries.com

"Rookery". The Oxford English Dictionary. คลังข้อมูลเก่าเก็บจากแหล่งเดิมเมื่อ 2019-06-02. สืบค้นเมื่อ 18 May 2019.

rspb.org.uk (Global: low place; Thai: low place)

"RSPB: Rook bird facts". สืบค้นเมื่อ 24 December 2020.

theguardian.com (Global: 12^th place; Thai: 51^st place)

Sample, Ian (26 May 2009). "Rooks rival chimpanzees in their ability to use tools". The Guardian. สืบค้นเมื่อ 25 June 2019.

web.archive.org (Global: 1^st place; Thai: 1^st place)

Goodwin, Derek (1955). "Some observations on the reproductive behaviour of rooks" (PDF). British Birds. 48 (3). คลังข้อมูลเก่าเก็บจากแหล่งเดิม (PDF)เมื่อ 2021-05-18. สืบค้นเมื่อ 2021-01-05.
"Rookery". The Oxford English Dictionary. คลังข้อมูลเก่าเก็บจากแหล่งเดิมเมื่อ 2019-06-02. สืบค้นเมื่อ 18 May 2019.

wildlifetrusts.org (Global: low place; Thai: low place)

"Rook | The Wildlife Trusts". www.wildlifetrusts.org.

worldcat.org (Global: 5^th place; Thai: 17^th place)

search.worldcat.org

Bird, Christopher D.; Emery, Nathan J. (2009). "Insightful problem solving and creative tool modification by captive nontool-using rooks". Proceedings of the National Academy of Sciences. 106 (25): 10370–10375. doi:10.1073/pnas.0901008106. ISSN 0027-8424. PMC 2700937. PMID 19478068.
Bird, Christopher D.; Emery, Nathan J. (2010). "Rooks perceive support relations similar to six-month-old babies". Proceedings of the Royal Society of London B: Biological Sciences. 277 (1678): 147–151. doi:10.1098/rspb.2009.1456. ISSN 0962-8452. PMC 2842627. PMID 19812083.

อีกาโคนปากขาว (Thai Wikipedia)

animaldiversity.org (Global: 1,859th place; Thai: 3,053rd place)

archive.org (Global: 6th place; Thai: 20th place)

bbc.co.uk (Global: 8th place; Thai: 15th place)

news.bbc.co.uk

books.google.com (Global: 3rd place; Thai: 5th place)

britishbirds.co.uk (Global: low place; Thai: low place)

bsc-eoc.org (Global: 4,338th place; Thai: 6,374th place)

avibase.bsc-eoc.org

ccsf.edu (Global: low place; Thai: low place)

fog.ccsf.edu

dktnfe.com (Global: low place; Thai: low place)

doi.org (Global: 2nd place; Thai: 4th place)

euring.org (Global: low place; Thai: low place)

hbw.com (Global: 3,128th place; Thai: low place)

inaturalist.ca (Global: low place; Thai: low place)

inaturalist.org (Global: 8,836th place; Thai: low place)

portugal.inaturalist.org

livescience.com (Global: 1,190th place; Thai: 1,616th place)

nih.gov (Global: 4th place; Thai: 7th place)

pubmed.ncbi.nlm.nih.gov

ncbi.nlm.nih.gov

nzbirdsonline.org.nz (Global: low place; Thai: low place)

oed.com (Global: 360th place; Thai: 312th place)

oxforddictionaries.com (Global: 710th place; Thai: 187th place)

en.oxforddictionaries.com

rspb.org.uk (Global: low place; Thai: low place)

theguardian.com (Global: 12th place; Thai: 51st place)

web.archive.org (Global: 1st place; Thai: 1st place)

wildlifetrusts.org (Global: low place; Thai: low place)

worldcat.org (Global: 5th place; Thai: 17th place)

search.worldcat.org

animaldiversity.org (Global: 1,859^th place; Thai: 3,053^rd place)

archive.org (Global: 6^th place; Thai: 20^th place)

bbc.co.uk (Global: 8^th place; Thai: 15^th place)

books.google.com (Global: 3^rd place; Thai: 5^th place)

bsc-eoc.org (Global: 4,338^th place; Thai: 6,374^th place)

doi.org (Global: 2^nd place; Thai: 4^th place)

hbw.com (Global: 3,128^th place; Thai: low place)

inaturalist.org (Global: 8,836^th place; Thai: low place)

livescience.com (Global: 1,190^th place; Thai: 1,616^th place)

nih.gov (Global: 4^th place; Thai: 7^th place)

oed.com (Global: 360^th place; Thai: 312^th place)

oxforddictionaries.com (Global: 710^th place; Thai: 187^th place)

theguardian.com (Global: 12^th place; Thai: 51^st place)

web.archive.org (Global: 1^st place; Thai: 1^st place)

worldcat.org (Global: 5^th place; Thai: 17^th place)