The Sunnyside Seniors primary concern is their Biodiversity Site within the Sunnyside Travelling Stock Reserve (TSR). Since receiving funding through the Federal Government's Biodiversity Fund the group have sought to regenerate this degraded site. This has involved fencing the site, controlling invasive species such as African lovegrass and planting out a diverse mix of endemic plants. A dam has also been created to provide habitat for the site's many feathered visitors. The site continues to evolve and engage with the Tenterfield community, with plans to hold a field day in the near future.