In addition, the Raptor Research Foundation cosponsored the event. One way that scientists can disseminate their findings is by presenting papers and posters at scientific meetings. In addition, our staff hosted symposia and distributed citizen-science materials at our display booth in the exhibit hall. The Cornell Nest Box Network , Birds in Forested Landscapes , the Cerulean Warbler Atlas Project , the House Finch Eye Disease Survey , and the Winter Finch Survey were among the projects represented at the meeting. Tracey Kast and David Winkler of the Cornell Nest Box Network presented two posters about the breeding biology of Tree Swallows and bluebirds.
Unsubstantiated theories abound about how birds' clutch sizes are governed.
Perhaps the Nest Box Network will shed light on this ornithological enigma in the near future. For a detailed look at the results we presented at the NAOC, visit the Lab's web site at birds.cornell.edu . This graph shows predicted clutch sizes for Eastern Bluebirds at -80.2 degrees west longitude. Clutch size increases as degrees of latitude increase, and clutch size decreases with advancing clutch-initiation date. In other words, the largest predicted clutch sizes occur early in the breeding season and in more northerly areas.