An adult male Indigo Bunting found by Jerry Ting on 6/28/17 continues on Alameda Creek north of the Sequoia Bridge. The bird loudly and frequently vocalizes in a 3-note trill, sometimes from the top of trees along the neighborhood on the fenced side of the creek, more often from the thick vegetation along the creek bank where it spends a lot of time under cover.
Jerry's ebird entry includes photos:
Bob Toleno and Juli Chamberlin posted an audio file on ebird:
Park in public parking along Sequoia Road in Fremont. Walk through the Creekside Village apartment complex to reach the creek at Sequoia Bridge, then turn left to find the spot where the bird has been seen, about 1/3 mile west of the Sequoia Bridge. Or park at the Isherwood staging area and walk back to this spot. GPS coordinates are in the ebird checklists.