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eBird | Crowdsourcing Bird Data

Case Study Overview

Several birders in a field looking through binoculars and cameras.

Birders sighting birds, identifying them and taking photos. Photo credit: Chris Wood.

Birds are among the world’s best ecological indicators. eBird allows volunteers anywhere in the world to submit data about the birds they see at any time and in any location. The millions of observations recorded each month, logged into a central database at the Cornell Lab of Ornithology, are building a global understanding of the distribution, abundance and movements of thousands of bird species. The information is used by scientists, land managers, and bird watchers to document changes in bird distributions, pinpoint bird populations in need of conservation, and locate places to find new birds.

Download this case study (PDF, 170KB)
Website: eBird

Project Description

Volunteers submit information about the kinds and numbers of birds they see at any location by clicking on an interactive map, which brings up a “smart” checklist containing the names of species likely to be seen in that location at that time of year. They enter data, which can include numbers of individual birds, nesting status and photos, into the form and submit the information to the Lab of Ornithology. Participants can view the accumulated eBird data on any species as a series of range maps, graphs and charts. The project allows bird watcher volunteers to keep detailed and accurate personal records of all of their bird sightings. They can refer to their records any time.


Birders in a boat with binoculars and cameras.

Birders looking for birds from a boat. Photo credit: Chris Wood.

eBird ensures data quality by managing a team of hundreds of regional editors around the world who control the fields in the data forms and check submitted records for accuracy. The project also partners with dozens of organizations around the world to manage local versions of eBird so that the project is sensitive to cultural and regional differences in bird-watching practices.

Benefits and Outcomes

eBird documents the abundance and distribution of most of the world’s bird species, which can be tracked over time by anybody with access to the Web. eBird data have been used in more than 100 peer-reviewed publications in scientific journals.



Birders in a field with tripods.

Birders in a field viewing birds with scopes on tripods. Photo credit: Chris Wood.

The eBird case study illustrates the following steps in the Federal Citizen Science and Crowdsourcing Toolkit:

  • Scope Your Problem — Engage Your Stakeholders and Participants
    eBird has benefited from the resources of numerous federal agencies and non-government partner organizations. The project manages a team of hundreds of regional editors around the world who make sure that data quality is high.
  • Build a Community — Know Your Community Partners
    eBird staff make continual presentations about the project and hold workshops for actual and potential project participants at bird meetings and festivals around the world.
  • Sustain and Improve — Adapt to Cycles of Participation
    eBird is supported by the Cornell Lab of Ornithology’s project evaluation team, which holds regular meetings to design and carry out activities to evaluate the project’s effectiveness.



Contact Information

Rick Bonney