Editing Ornithology (section)

===Collaborative studies===
[[File:CanadaGooseSummer19942003.png|thumb|right|Summer distribution and abundance of [[Canada goose]] using data from the North American Breeding Bird Surveys 1994–2003]]
With the widespread interest in birds,  use of a large number of people to work on collaborative ornithological projects that cover large geographic scales has been possible.<ref>{{cite journal|first1=Caren B. | last1=Cooper | author-link=Caren Cooper | first2=Janis | last2=Dickinson | first3=Tina | last3=Phillips | first4=Rick | last4=Bonney|year=2007|title=Citizen science as a tool for conservation in residential ecosystems|journal=Ecology and Society|volume=12|issue=2|page=11|doi=10.5751/ES-02197-120211|doi-access=free|hdl=10535/2968|hdl-access=free}}</ref><ref>{{cite journal|author=Greenwood, J.J.D.|year=2007|title=Citizens, science and bird conservation|journal=Journal of Ornithology|volume=148|issue=1|pages=77–124|doi=10.1007/s10336-007-0239-9|bibcode=2007JOrn..148...77G |s2cid=21914046|url=http://www.dof.dk/sider/images/stories/gu/vu/dokumenter/greenwood_vu.pdf|url-status=dead|archive-url=https://web.archive.org/web/20110719123722/http://www.dof.dk/sider/images/stories/gu/vu/dokumenter/greenwood_vu.pdf|archive-date=2011-07-19}}</ref> These [[citizen science]] projects include nationwide projects such as the [[Christmas Bird Count]],<ref>{{cite book|author=Wing, L.|year=1947|title=Christmas census summary 1900–1939|publisher=State College of Washington, Pullman. Mimeograph.}}</ref> Backyard Bird Count,<ref>{{cite web|url=http://www.birdsource.org/gbbc|title=Great Backyard Bird Count}}</ref> the North American [[Breeding Bird Survey]], the Canadian EPOQ<ref>{{cite web|url=http://www.oiseauxqc.org/epoq.html|title=Étude des populations d'oiseaux du Québec|work=oiseauxqc.org}}</ref> or regional projects such as the Asian Waterfowl Census and [http://www.springalive.net/world Spring Alive] in Europe. These projects help to identify distributions of birds, their population densities and changes over time, arrival and departure dates of migration, breeding seasonality, and even population genetics.<ref>{{cite web|url=http://www.birds.cornell.edu/programs/urbanbirds/ubs_PIWMainEN.html|title=Project PigeonWatch}}</ref> The results of many of these projects are published as [[bird atlas]]es. Studies of migration using bird ringing or colour marking often involve the cooperation of people and organizations in different countries.<ref>[http://www.euring.org/ EURING Coordinated bird-ringing in Europe]. Euring.org. Retrieved on 2013-02-22.</ref>