Barrow’s goldeneye nest in cavities in large trees or in nest boxes. They are common fall residents at Lake Solano, where they spend much of their time diving for a variety of prey, including mollusks, crustaceans, fish and occasionally fish eggs. Dee E. Warenycia/Courtesy photo

Hooded mergansers have a crest that can be spread or closed, like a fan. Mergansers have exceptional underwater vision, which helps them forage in Lake Solano for crawdads and aquatic insects once they arrive here in the fall. John White/Courtesy photo

Last summer, Watershed Wonders canoe trip participants explored the creek and learned about Putah Creek hydrology on a beautiful sunshine-filled day. Stephen McCord/Courtesy photo