Pine Canyon, which encompasses the Castle Rock (EBRPD) recreation area and Diablo Foothills Regional Park, provides rich habitat for spring migrants and returning summer residents. Warbling Vireos and their cousins, Cassin’s Vireos, both nest within the canyon. We also hope to find orioles, flycatchers, wrens, and various warblers—and if we’re lucky, a Lazuli Bunting or […]