bird surveys

The annual “Great Backyard Bird Count” asks people to track the birds they see and hear over a few days. The information can help researchers better understand bird populations and whether species are declining.

The North American Breeding Bird Survey is a cooperative effort between the United States and Canada. The bird survey is a long-term, large-scale,…

How do scientists get the data they need to study birds? A lot of data is collected by volunteers, "citizen scientists," through bird surveys and bird…