The primary goal of a Breeding Bird Atlas is to determine the distribution of all species which are breeding within a given area. But an atlas can also produce a wealth of additional environmental information.
A breeding bird atlas is a book which describes all of the birds that have been recorded breeding within a specific region. This book is assembled from a very large collection of records compiled by birdwatchers in that region during a specific time period.
One of the benefits of a citizen science project is that there are many participants, spread over a large geographic area. It is the combination of all the data from each participant within a single database that endows your data with immense scientific power.
Citizen science is the term for scientific projects in which the average citizen can take part. The project itself is set-up and monitored by professional biologists and scientists but much of the field work contribution, in the form of collected data, comes from ordinary citizens.