Tham khảo Cu cu mỏ vàng

  • BirdLife International (2004). Coccyzus americanus. Sách đỏ 2006. IUCN 2006. Truy cập ngày 11 tháng 5 năm 2006. Database entry includes justification for why this species is of least concern
  • John K. Terres (1980), Audubon Society Encyclopedia of North American Birds, Knopf, ISBN 0-394-46651-9
  • David Gaines Review of the Status of the Yellow-Billed Cuckoo in California: Sacramento Valley Populations The Condor, Vol. 76, No. 2 (Summer, 1974), pp. 204–209
  • Laymon, S.A., and M.D. Halterman. 1987. Can the western subspecies of Yellow-billed Cuckoo be saved from extinction? Western Birds 18:19-25.

Tài liệu tham khảo

WikiPedia: Cu cu mỏ vàng http://enature.com/fieldguides/detail.asp?allSpeci... http://www.birds.cornell.edu/AllAboutBirds/BirdGui... http://www.birds.cornell.edu/clementschecklist/dow... http://www.backyardnature.net/n/03/030720.htm http://www.biologicaldiversity.org/swcbd/species/c... http://www.iucnredlist.org/details/22684331/0 http://www.iucnredlist.org/search/details.php/4787... https://web.archive.org/web/20100722025056/http://... https://commons.wikimedia.org/wiki/Coccyzus_americ...