[EBB Sightings] Varied Thrush

There was a singing/calling varied Thrush on the Wildcat Gorge Trail [near
Lake Anza] in Tilden Park this a.m. also up on the Curran Trail there was a
singing Fox Sparrow, I do not think I have ever heard one sing in the bay
area before, isn't it kind of unusual?
 P.S. I hope I spelled signing right this time.
Michael Butler