The American Robin (Turdus migratorius) is a widespread and recognized bird across North America, often signaling the arrival of spring. Their familiar presence leads many people to encourage them to nest nearby. Successfully attracting robins requires understanding the specific architectural needs of their nests.
Understanding Robin Nesting Preferences
Robins belong to a category of birds known as open-cup nesters. This means they build their nests on a supportive, exposed base rather than inside a confined space. This preference explains why they do not use the enclosed birdhouses commonly designed for species like wrens or chickadees. A standard birdhouse, which mimics a tree cavity, is structurally incompatible with the robin’s nesting behavior.
The female constructs a substantial, bowl-shaped nest that typically measures between six and eight inches across. This structure requires a solid, open platform for support. The nest is built using coarse grass and twigs cemented together with a heavy layer of mud. This outer shell is then lined with fine, dry grass to create a soft interior cup for the eggs.
Providing Suitable Nesting Platforms
Since enclosed houses are unsuitable, the solution for attracting robins is to provide a nesting shelf or platform. This structure is a three-sided, open-fronted box that offers the birds a sheltered ledge similar to what they naturally seek. The design must offer a flat, sturdy base large enough to support the finished nest. A floor size of approximately seven by eight inches is recommended to accommodate the nest cup.
The nesting shelf should include a protective roof that overhangs the platform to shield the nest from heavy rain and direct sun exposure. The side walls should be relatively short, extending only about three to four and a half inches high, leaving the front completely open for easy access. Cedar or redwood are suitable wood choices due to their natural resistance to insects and weathering. Small drainage holes should be drilled in the base corners to prevent standing water.
Optimal Placement for Robin Nests
The success of a nesting platform is highly dependent on its placement, which should mimic the protected ledges robins favor in nature. Robins frequently build nests on horizontal tree branches, but also readily use man-made structures like window ledges, gutters, and porch eaves. The artificial shelf should be securely fastened to a building, such as on the side of a garage or under a deck.
An installation height between five and fifteen feet off the ground is considered ideal. This height balances accessibility for the birds with protection from ground predators. The location should be stable and protected from strong winds and intense afternoon sun; avoiding south-facing walls helps prevent the nest from becoming overheated. If installing multiple platforms, they must be spaced at least 65 feet apart, as robins are territorial during the breeding season.