Join volunteer naturalists to learn about birding year-round in Boulder County. This program will explore where to find and how to identify some of our local and migratory birds and introduce you to an amazing range of ecosystems and habitats. Registration for most programs begins on the 20th of the month before the event. Registration required. Register Registration is required through Discover Boulder County, Parks & Open Space’s volunteer and event registration system. If you’re new to the system, you'll need to create an account. But it’s easy and we only use your contact information to communicate about events you register for. We will never sell or give your information to a third party.