The closest ones were only about two feet from where I stood so I slowly and carefully pulled the phone from my pocket and took these pictures before they spooked and flew.
I believe they are waxwings, but must be juveniles as they were mostly gray except for a yellow tail stripe and black eye patches.
I'll investigate further when I get home to my computer. Meantime, any thoughts as to whether these are Cedar or Bohemian Waxwings?