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All About Birdhouses

Managing House Sparrows and European Starlings

Please note that the methods described below are only for controlling House Sparrows (Passer domesticus) and European Starlings (Sturnus vulgaris), which are not protected by the Migratory Bird Treaty Act, and that it is illegal to harm or harass any native species, including their nests and eggs. Background Invasive exotic species are those introduced species […]


Invasive Species in Nest Boxes

We recently published a paper on the results of our 2018 survey concerning invasive species.

How are people managing invasive birds at nest boxes?

A new study from NestWatch investigated how many people had experience with non-native birds in their nest boxes. The study explored peoples’ knowledge of House Sparrows and European Starlings, and their attitudes towards managing them, especially if people encountered these non-native birds in their monitored nest boxes.

Frequently Asked Questions

What should I do if another bird interferes with a nest I’m watching?

If another bird takes over the nest, while the original birds had eggs or young in the nest, there is a special way to report this to NestWatch: Summarize the original bird’s nest and choose the outcome “Failure due to takeover by another bird” and record the species if you know it. Finish summarizing the […]

Cornell Lab of Ornithology

Cornell Lab of Ornithology