The nest, the cloud, and the crowd: Digitizing North America's historic bird nest records

Material Description

The nominated collection is the North American Nest Record Card Program's set of ~334,000 nest record cards: handwritten index cards containing nesting data from at least 595 species of birds primarily from the United States. In 1963, the Cornell Lab of Ornithology started the North American Nest Record Card Program to solicit information from birdwatchers about the nesting birds they found while out in the field.The Cornell Lab distributed hundreds of thousands of pre-formatted cards on which volunteers could record nesting events. Participants then mailed their cards, each describing a nesting event, to the Lab of Ornithology. For more than three decades (1963-1999), individual birdwatchers, Audubon clubs, regional bird clubs, students, professionals, and others participated in the project. Upon receiving the cards, Lab staff would number and file them according to species, in the order that they were received. The North American Nest Record Card Program protocol is based upon the British Trust for Ornithology's Nest Record Scheme ( which dates back to 1939. These protocols asked volunteers to make multiple visits to nests on a regular basis and use standard data forms to record what they observed during each visit throughout the nesting cycle. Specifically, volunteers recorded species, year, location, surrounding habitat, nest height, number of eggs, number of hatched young, dates of egg-laying and hatching, and the final nest outcome (plus additional comments). Cornell's nest record card program is similar to a nest record scheme developed by Bird Studies Canada in the mid-1950s ( Their common protocols make the cards from the United States very compatible with those from the UK and Canada, allowing for international studies of birds' nesting habits utilizing a standardized protocol.

Year Added:



Cornell University


Dr. David Bonter
Cornell Lab of Ornithology

Date Range

1963 - 1999

Geographic Scope

The cards cover all regions of the continental United States and Hawai'i. A small percentage are from Canada and Mexico.


  • 334015 Ephemera