Posted by Chris Howard, Bishop, CA (209.209.66.205) on March 02, 2000 at 16:46:19:
I'd say the thrasher is a Bendire's and the bluebird is a Mountain.
On the thrasher, the relatively short, not too decurved bill and the yellow iris are convincing signs...as well as the brown, splotchy breast spots.
On the bluebird, among other indications like dull gray upper back and inconspicuous eye-ring, the primary projection appears really long.
Good Birding!