World Bird List

Species factsheet
Williamson's Sapsucker (Sphyrapicus thyroideus)

Order: Sphyrapicus thyroideus
Family: Woodpeckers (Picidae)

Voices can be found here (external link)
Subspecies and Distribution
Subspecie Distribution
thyroideus s British Columbia (Canada) to n Baja California (Mexico)
nataliae se British Columbia (Canada) through wc USA
Annoncer