Song: Bubbly jumble of mixed whistled or trilled notes. Notes are repeated in a thrasher-like pattern 2-4 times "k-tee k-tee wij-ij-ij-ij treeoo treeoo tsbrr tsbrr tsbrr" but more clear, higher pitched and with more consistent rhythm than any thrasher. Call is a sharp "bup".
Sound: John Neville
(Songs and Sounds of the Canadian Rockies); Adult; Primary Sound;