Bluebirds are migratory songbirds that brighten up Castle Rock with their blue coloring. The Town has led a local division of the Colorado Bluebird Project since 2007 to create and monitor nesting boxes throughout our parks, open spaces, trails and schools. Over time, development has decreased the amount of natural bluebird nesting places. Interested in helping our bluebirds? Whether you are a backyard birder or interested in helping us monitor nestboxes on Town properties, attend this open house to learn more about bluebird nest boxes, habitats and these beautiful songbirds.