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The Cornell Lab NestWatch


NestWatch is a nationwide monitoring program designed to track status and trends in the reproductive biology of birds, including when nesting occurs, number of eggs laid, how many eggs hatch, and how many hatchlings survive. Our database is intended to be used to study the current condition of breeding bird populations and how they may be changing over time as a result of climate change, habitat degradation and loss, expansion of urban areas, and the introduction of non-native plants and animals.


Participating in NestWatch is easy and just about anyone can do it, although children should always be accompanied by an adult when observing bird nests. Simply follow the directions on our website to become a certified NestWatcher, find a bird nest using these tips, visit the nest every 3-4 days and record what you see, and then report the information to the NestWatch site.

You can also download the NestWatch Mobile App for iOS and Android and record what you see at the nest in real time. Find more information and tips in our FAQs.

Photo credit: Dyona Dallas

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