I was at Yosemite NP on June 4-7 of this year. Best birding spot I found was Badger Pass Ski Area, off of Glacier Point Rd. It was closed to autos, but the walk in was very short. Flycatchers, red-breasted sapsucker, MacGillivray's warbler, etc. Easy birding around the parking lots and paths. The young conifers and the shrubs in marshy areas were loaded with birds! I found black swift at an overlook on Big Oak Flat Rd. coming into Yosemite Valley, not at Bridalveil Falls. Peter Lev