Song: Series of repeated high-pitched whistled notes: "cheeweee", "weet-weet" or "peeta-peeta-peeta". Call notes are varied, high pitched twittering "spi-spi-spi", buzzy "siu-siu-siu" notes similar to Bushtit or Chickadee calls.
Sound: Kevin J. Colver; May; AZ; Adult; Primary Sound;