What time frame do birds typically choose to nest under solar panels?

Nesting Season Timing

Birds often select solar panel nesting sites during the early breeding season, which can vary by species and region. For example, the American Robin typically begins breeding in late March to early April in the northern United States. Other bird species, such as the Common Grackle, may nest under solar panels in late April to early May. Understanding the local nesting season can help homeowners and solar panel installers anticipate and prevent bird nesting under solar panels.

Deterrent Techniques

Effective bird deterrent techniques for solar panels involve a combination of physical barriers, visual deterrents, and auditory devices. Installing a 1-2 inch (2.5-5 cm) wide band of plastic or metal around the top of the solar panel array can deter birds from nesting. Visual deterrents, such as shiny reflective surfaces or predator decoys, can also be effective when placed near the solar panel array. Auditory devices, such as ultrasonic bird repellers, can be programmed to emit sounds unpleasant to birds at specific times of day, typically during the early morning and late afternoon when birds are most active.

Physical Modifications

Physical modifications to solar panel arrays can reduce the likelihood of bird nesting. Installing a solar panel overhang or roof extension with a 24-36 inch (60-90 cm) wide lip can deter birds from nesting under the array. Other modifications, such as installing a net or screen under the solar panel array, can also prevent bird nesting. When physical modifications are not feasible, solar panel installers can work with homeowners to select bird-friendly solar panel installation locations, such as areas with existing bird nesting sites, to minimize the impact on local bird populations.