Nesting birds are an important part of Pasadena’s biodiversity. There are more than 35 native species that nest in Pasadena amongst urban trees, parks, and buildings. These species and their nests are protected by federal and state laws. Tree trimming contractors are required to not disturb trees that have nesting birds. The Pasadena Audubon Society is voluntarily assisting the City of Pasadena to protect nesting birds and ensure compliance with the law by informing the public of the protections, and how to prevent nest failures.