FREE. Short science spiels on Sonoma County parks, including Q&A. Apr. 1 (2:30 p.m.): Why Are There Cattle in Our Parks? Apr. 8 (2:30 p.m.): The Rich Biodiversity of Doran Regional Park’s Marsh. Apr. 8 (2 p.m.): La Rica Biodiversidad del Pantano del parque Regional Doran (en español). Apr. 15 (2:30 p.m.): Firs, Oaks & Fire. Apr. 22 (2:30 p.m.): Flourishing Flowers. facebook.com/sonomacountyregionalparks.