Today, 4/24/18, I went to Yellowjacket Canyon with Peter Derven. We located 7 LUCY'S WARBLERS along the creek and expect that there could be at least 5 territories. Other warblers in the riparian zone included: Orange-crowned Warbler (1), Virginia's Warbler (2), and Yellow Warbler (2). An adult male SUMMER TANAGER was located on the downstream section of the creek. A Plumbeous Vireo and Gray Flycatcher were also seen.